Oklahoma · drinking water · SDWIS through latest publish

Calera Pwa Water Quality — Calera, Oklahoma

PWSID OK2000702 · GroundwaterMunicipal

2,815 people served. 136 health-based SDWIS violations recorded in the past 5 years. 138 remain unresolved. Last cited 2 years ago.

ALL SDWIS VIOLATIONS · 20212026 (annual count)
Bar chart of annual values from 2021 to 2026, in violations. Most recent year (2026): 0 violations.101 violations'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Haloacetic Acids (HAA5)

Unresolved Total Trihalomethanes Rule violation cited in 2023 (haloacetic acids (haa5)).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Haloacetic Acids (HAA5)

Unresolved Total Trihalomethanes Rule violation cited in 2023 (haloacetic acids (haa5)).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Haloacetic Acids (HAA5)

Unresolved Total Trihalomethanes Rule violation cited in 2023 (haloacetic acids (haa5)).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Haloacetic Acids (HAA5)

Unresolved Total Trihalomethanes Rule violation cited in 2023 (haloacetic acids (haa5)).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Haloacetic Acids (HAA5)78 citations
  • Total Trihalomethanes (TTHM)61 citations
  • Chlorine11 citations
  • Contaminant 800011 citations
  • Contaminant 52002 citations
  • Endrin1 citation
Violation history

What's On The SDWIS Record

Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.

HEALTH-BASED · CONTAMINANT 5200

2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5200

MONITORING · CONTAMINANT 5200

2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules

Reporting failure; returned to compliance

CONTAMINANT CODE 5200

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CHLORINEUNRESOLVED

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled

CONTAMINANT CODE 0999

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000UNRESOLVED

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CHLORINEUNRESOLVED

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled

CONTAMINANT CODE 0999

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000UNRESOLVED

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CHLORINEUNRESOLVED

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled

CONTAMINANT CODE 0999

MONITORING · CHLORINE

2023 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000UNRESOLVED

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

MONITORING · CONTAMINANT 8000

2023 · Contaminant 8000 · Revised Total Coliform Rule

Monitoring failure; returned to compliance

CONTAMINANT CODE 8000

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

MONITORING · ENDRINUNRESOLVED

2022 · Endrin · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2005

MONITORING · LINDANEUNRESOLVED

2022 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2010

MONITORING · METHOXYCHLORUNRESOLVED

2022 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2015

MONITORING · TOXAPHENEUNRESOLVED

2022 · Toxaphene · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2020

MONITORING · CONTAMINANT 2031UNRESOLVED

2022 · Contaminant 2031 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2031

MONITORING · CONTAMINANT 2032UNRESOLVED

2022 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2033UNRESOLVED

2022 · Contaminant 2033 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2033

MONITORING · CONTAMINANT 2034UNRESOLVED

2022 · Contaminant 2034 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2034

MONITORING · CONTAMINANT 2035UNRESOLVED

2022 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2036UNRESOLVED

2022 · Contaminant 2036 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2036

MONITORING · CONTAMINANT 2037UNRESOLVED

2022 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2039UNRESOLVED

2022 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2040UNRESOLVED

2022 · Contaminant 2040 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2040

MONITORING · CONTAMINANT 2041UNRESOLVED

2022 · Contaminant 2041 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2041

MONITORING · CONTAMINANT 2042UNRESOLVED

2022 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2042

MONITORING · CONTAMINANT 2046UNRESOLVED

2022 · Contaminant 2046 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2046

MONITORING · 2,4-DUNRESOLVED

2022 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · CONTAMINANT 2051UNRESOLVED

2022 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2051

MONITORING · 2,4,5-TP (SILVEX)UNRESOLVED

2022 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2065

MONITORING · CONTAMINANT 2067UNRESOLVED

2022 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2067

MONITORING · ALACHLORUNRESOLVED

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ATRAZINEUNRESOLVED

2022 · Atrazine · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2110

MONITORING · CONTAMINANT 2274UNRESOLVED

2022 · Contaminant 2274 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2274

MONITORING · CARBOFURANUNRESOLVED

2022 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2306

MONITORING · CONTAMINANT 2326UNRESOLVED

2022 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2326

MONITORING · TRICHLOROETHYLENE (TCE)UNRESOLVED

2022 · Trichloroethylene (TCE) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2383

MONITORING · CONTAMINANT 2931UNRESOLVED

2022 · Contaminant 2931 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2931

MONITORING · CONTAMINANT 2946UNRESOLVED

2022 · Contaminant 2946 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2946

MONITORING · CONTAMINANT 2959UNRESOLVED

2022 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2959

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

MONITORING · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2456

MONITORING · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)UNRESOLVED

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2456

HEALTH-BASED · HALOACETIC ACIDS (HAA5)

2021 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2456

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded

CONTAMINANT CODE 2950

HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)

2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 2950

Equity context · ACS 2018-2022 · USEPA-clone EJ disparity

Who Drinks This Water

Calera, Oklahoma (Census place; block-group disparity scores aggregated by centroid containment): a service population of 2,896. Local disparity score for pm2.5 (fine particulate) sits near the reference (103). Why we surface this →

POPULATION SHARE
13.7%

Low-income

POPULATION SHARE
35.2%

People of color

POPULATION SHARE
6.9%

Under age 5

POPULATION SHARE
10.3%

Over age 64

NATIONAL PERCENTILE · vs all US block groups (population-weighted; ranked against the national EJScreen indicator distribution)

  • PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.63above the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.50near the national median
  • Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.33below the national median
  • Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.19below the national median
  • Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.82in the highest 20% nationally
  • Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.20below the national median
  • Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.26below the national median
  • Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.56near the national median
  • RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.46near the national median
  • Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.30below the national median
  • Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.38below the national median
  • NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.50near the national median
  • Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.100in the highest 5% nationally
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)103near the reference
Ozone94near the reference
Nitrogen dioxide (NO₂)51below the reference
Diesel particulate33well below the reference
Toxic releases (RSEI)128moderately above the reference
Traffic proximity35well below the reference
Lead-paint risk (pre-1960 housing)33well below the reference
Superfund site proximity0well below the reference
RMP-facility proximity73below the reference
Hazardous-waste site proximity49well below the reference
Underground storage tanks59below the reference
NPDES wastewater proximity78below the reference
Drinking-water non-compliance157well above the reference burden

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).

Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2021-01-012026-05-07.

What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.