Colorado · drinking water · SDWIS through latest publish

Cheraw Town Of Water Quality — Cheraw, Colorado

PWSID CO0145090 · GroundwaterMunicipal

254 people served. 58 health-based SDWIS violations recorded in the past 5 years. 56 remain unresolved. Last cited this year.

ALL SDWIS VIOLATIONS · 20202026 (annual count)
Bar chart of annual values from 2020 to 2026, in violations. Most recent year (2026): 2 violations.37 violations'20'21'22'23'24'25'262 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 5000

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2026 (contaminant 5000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 7500

Unresolved Volatile Organic Chemical Rule violation cited in 2026 (contaminant 7500).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 5000

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 5000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 4010

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 4010).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 401055 citations
  • Combined Radium 226/22825 citations
  • Contaminant 750015 citations
  • Uranium14 citations
  • Contaminant 500013 citations
  • Contaminant 52003 citations
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.

MONITORING · CONTAMINANT 5000UNRESOLVED

2026 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

OTHER · CONTAMINANT 7500UNRESOLVED

2026 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER

CONTAMINANT CODE 7500

MONITORING · CONTAMINANT 5000UNRESOLVED

2025 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 4010UNRESOLVED

2025 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

2025 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · COMBINED RADIUM 226/228UNRESOLVED

2025 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228

2025 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUMUNRESOLVED

2025 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUM

2025 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · CONTAMINANT 5000UNRESOLVED

2025 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000UNRESOLVED

2025 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

OTHER · CONTAMINANT 7000

2025 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

OTHER · CONTAMINANT 7000

2025 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

MONITORING · CONTAMINANT 4010UNRESOLVED

2025 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

2025 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · COMBINED RADIUM 226/228UNRESOLVED

2025 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228

2025 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUMUNRESOLVED

2025 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUM

2025 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2025 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

OTHER · CONTAMINANT 7500

2024 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2024 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2024 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

MONITORING · COMBINED RADIUM 226/228

2024 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228UNRESOLVED

2024 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228

2024 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUM

2024 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · URANIUMUNRESOLVED

2024 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUM

2024 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · CONTAMINANT 4010

2024 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010UNRESOLVED

2024 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

2024 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2024 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2024 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2024 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

OTHER · CONTAMINANT 7500

2024 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2024 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

MONITORING · CONTAMINANT 5000UNRESOLVED

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5200

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

Reporting failure; returned to compliance

CONTAMINANT CODE 5200

MONITORING · CONTAMINANT 5200

2024 · Contaminant 5200 · Lead and Copper Rule

Reporting failure; 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

MONITORING · URANIUM

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · URANIUMUNRESOLVED

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUMUNRESOLVED

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUM

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · COMBINED RADIUM 226/228

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228UNRESOLVED

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

MONITORING · COMBINED RADIUM 226/228

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228UNRESOLVED

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · CONTAMINANT 4010

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 5000

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · URANIUM

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · URANIUMUNRESOLVED

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUM

2023 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · COMBINED RADIUM 226/228

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2023 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

HEALTH-BASED · CONTAMINANT 4010

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2023 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 1022UNRESOLVED

2023 · Contaminant 1022 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1022

MONITORING · LEADUNRESOLVED

2023 · Lead · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1030

MONITORING · CONTAMINANT 5000

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

HEALTH-BASED · CONTAMINANT 0400

2022 · Contaminant 0400 · Disinfectants and Disinfection Byproducts (Stage 2)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0400

HEALTH-BASED · CONTAMINANT 0400

2022 · Contaminant 0400 · Disinfectants and Disinfection Byproducts (Stage 2)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0400

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4000

HEALTH-BASED · COMBINED RADIUM 226/228UNRESOLVED

2022 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4000

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2022 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

OTHER · CONTAMINANT 7500

2021 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2021 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

OTHER · CONTAMINANT 7500

2020 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

MONITORING · CONTAMINANT 4010

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 5000

2020 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2020 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010UNRESOLVED

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 4010

2020 · Contaminant 4010 · Phase I/II/V Inorganic Chemical Rules

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

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

Who Drinks This Water

Otero County, Colorado (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 18,580. Local disparity score for pm2.5 (fine particulate) sits well below the reference (6). Why we surface this →

POPULATION SHARE
24.0%

Low-income

POPULATION SHARE
48.9%

People of color

POPULATION SHARE
5.9%

Under age 5

POPULATION SHARE
21.1%

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.3below the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.64above 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.35below 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.7below 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.5below the national median
  • 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.18below 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.80in the highest 20% nationally
  • 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.49near 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.14below 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.55near 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.85in the highest 20% nationally
  • 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.93in the highest 10% nationally
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)6well below the reference
Ozone168well above the reference burden
Nitrogen dioxide (NO₂)70below the reference
Diesel particulate16well below the reference
Toxic releases (RSEI)1well below the reference
Traffic proximity37well below the reference
Lead-paint risk (pre-1960 housing)142moderately above the reference
Superfund site proximity0well below the reference
RMP-facility proximity60below the reference
Hazardous-waste site proximity0well below the reference
Underground storage tanks74below the reference
NPDES wastewater proximity133moderately above the reference
Drinking-water non-compliance31well below the reference

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 2020-01-012026-05-07.

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.