Wyoming · drinking water · SDWIS through latest publish

Lance Creek Water District Water Quality — Lance Creek, Wyoming

PWSID WY5600109 · GroundwaterMunicipal

45 people served. 38 health-based SDWIS violations recorded in the past 5 years. 60 remain unresolved. Last cited 1 year ago.

ALL SDWIS VIOLATIONS · 20202026 (annual count)
Bar chart of annual values from 2020 to 2026, in violations. Most recent year (2026): 0 violations.50 violations'20'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Xylenes (total)

Unresolved Arsenic Rule violation cited in 2025 (xylenes (total)).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Benzene

Unresolved Arsenic Rule violation cited in 2025 (benzene).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 2955

Unresolved Arsenic Rule violation cited in 2025 (contaminant 2955).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 2964

Unresolved Arsenic Rule violation cited in 2025 (contaminant 2964).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 401051 citations
  • Combined Radium 226/22814 citations
  • Uranium14 citations
  • Contaminant 402014 citations
  • Contaminant 403014 citations
  • Contaminant 70002 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 · ENDRIN

2025 · Endrin · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2005

MONITORING · LINDANE

2025 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2010

MONITORING · METHOXYCHLOR

2025 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2015

MONITORING · TOXAPHENE

2025 · Toxaphene · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2020

MONITORING · CONTAMINANT 2031

2025 · Contaminant 2031 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2031

MONITORING · CONTAMINANT 2032

2025 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2033

2025 · Contaminant 2033 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2033

MONITORING · CONTAMINANT 2034

2025 · Contaminant 2034 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2034

MONITORING · CONTAMINANT 2035

2025 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2036

2025 · Contaminant 2036 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2036

MONITORING · CONTAMINANT 2037

2025 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2039

2025 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2040

2025 · Contaminant 2040 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2040

MONITORING · CONTAMINANT 2041

2025 · Contaminant 2041 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2041

MONITORING · CONTAMINANT 2042

2025 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2042

MONITORING · CONTAMINANT 2046

2025 · Contaminant 2046 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2046

MONITORING · 2,4-D

2025 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2050

MONITORING · CONTAMINANT 2051

2025 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2051

MONITORING · 2,4,5-TP (SILVEX)

2025 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2065

MONITORING · CONTAMINANT 2067

2025 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2067

MONITORING · ALACHLOR

2025 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ATRAZINE

2025 · Atrazine · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2110

MONITORING · CONTAMINANT 2274

2025 · Contaminant 2274 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2274

MONITORING · CARBOFURAN

2025 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2306

MONITORING · CONTAMINANT 2326

2025 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2326

MONITORING · TRICHLOROETHYLENE (TCE)

2025 · Trichloroethylene (TCE) · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2383

MONITORING · CONTAMINANT 2931

2025 · Contaminant 2931 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2931

MONITORING · CONTAMINANT 2946

2025 · Contaminant 2946 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2946

MONITORING · CONTAMINANT 2959

2025 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2959

MONITORING · XYLENES (TOTAL)UNRESOLVED

2025 · Xylenes (total) · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2378

MONITORING · BENZENEUNRESOLVED

2025 · Benzene · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2380

MONITORING · CONTAMINANT 2955UNRESOLVED

2025 · Contaminant 2955 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2955

MONITORING · CONTAMINANT 2964UNRESOLVED

2025 · Contaminant 2964 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2964

MONITORING · CONTAMINANT 2968UNRESOLVED

2025 · Contaminant 2968 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2968

MONITORING · CONTAMINANT 2969UNRESOLVED

2025 · Contaminant 2969 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2969

MONITORING · CONTAMINANT 2976UNRESOLVED

2025 · Contaminant 2976 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2976

MONITORING · CONTAMINANT 2977UNRESOLVED

2025 · Contaminant 2977 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2977

MONITORING · CONTAMINANT 2979UNRESOLVED

2025 · Contaminant 2979 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2979

MONITORING · METHYL TERT-BUTYL ETHER (MTBE)UNRESOLVED

2025 · Methyl tert-butyl ether (MTBE) · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2980

MONITORING · CONTAMINANT 2981UNRESOLVED

2025 · Contaminant 2981 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2981

MONITORING · CONTAMINANT 2982UNRESOLVED

2025 · Contaminant 2982 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2982

MONITORING · CONTAMINANT 2983UNRESOLVED

2025 · Contaminant 2983 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2983

MONITORING · CONTAMINANT 2984UNRESOLVED

2025 · Contaminant 2984 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2984

MONITORING · CONTAMINANT 2985UNRESOLVED

2025 · Contaminant 2985 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2985

MONITORING · CONTAMINANT 2987UNRESOLVED

2025 · Contaminant 2987 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2987

MONITORING · CONTAMINANT 2989UNRESOLVED

2025 · Contaminant 2989 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2989

MONITORING · CONTAMINANT 2990UNRESOLVED

2025 · Contaminant 2990 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2990

MONITORING · CONTAMINANT 2991UNRESOLVED

2025 · Contaminant 2991 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2991

MONITORING · CONTAMINANT 2992UNRESOLVED

2025 · Contaminant 2992 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2992

MONITORING · CONTAMINANT 2996UNRESOLVED

2025 · Contaminant 2996 · Arsenic Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2996

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

MONITORING · CONTAMINANT 4020

2024 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020UNRESOLVED

2024 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020

2024 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4030

2024 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030UNRESOLVED

2024 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030

2024 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

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 4010

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

Maximum contaminant level exceeded; returned to compliance

CONTAMINANT CODE 4010

HEALTH-BASED · CONTAMINANT 0700UNRESOLVED

2023 · Contaminant 0700 · Drinking water rule (140)

Treatment technique violation

CONTAMINANT CODE 0700

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

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 · 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

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 4010UNRESOLVED

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

Failure to monitor as scheduled

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

MONITORING · CONTAMINANT 4020

2023 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020UNRESOLVED

2023 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020

2023 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4030

2023 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030UNRESOLVED

2023 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030

2023 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

MONITORING · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2023 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2950

MONITORING · HALOACETIC ACIDS (HAA5)UNRESOLVED

2023 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2456

MONITORING · COMBINED RADIUM 226/228

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUM

2022 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · CONTAMINANT 4010

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4020

2022 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4030

2022 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

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 · 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

MONITORING · COMBINED RADIUM 226/228

2022 · 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

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

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · COMBINED RADIUM 226/228

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUM

2022 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · URANIUMUNRESOLVED

2022 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4006

MONITORING · URANIUM

2022 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · CONTAMINANT 4010

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010UNRESOLVED

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

Failure to monitor as scheduled

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4020

2022 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020UNRESOLVED

2022 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020

2022 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4030

2022 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030UNRESOLVED

2022 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030

2022 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

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

MONITORING · COMBINED RADIUM 226/228

2021 · 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 226/228

2021 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUM

2021 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · URANIUM

2021 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · CONTAMINANT 4010

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4010

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4020

2021 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020

2021 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4030

2021 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030

2021 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

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

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

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 · COMBINED RADIUM 226/228

2020 · 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 226/228

2020 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4000

MONITORING · URANIUM

2020 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

MONITORING · URANIUM

2020 · Uranium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4006

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 4010

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4010

MONITORING · CONTAMINANT 4020

2020 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4020

2020 · Contaminant 4020 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4020

MONITORING · CONTAMINANT 4030

2020 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

MONITORING · CONTAMINANT 4030

2020 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 4030

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 5000

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

OTHER · CONTAMINANT 7000

2020 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

OTHER · CONTAMINANT 7000

2020 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

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 1094UNRESOLVED

2020 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094

2020 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1094

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

Who Drinks This Water

Lance Creek, Wyoming (Census place; block-group disparity scores aggregated by centroid containment): a service population of 49. Local disparity score for pm2.5 (fine particulate) sits well below the reference (0). Why we surface this →

POPULATION SHARE
61.2%

Low-income

POPULATION SHARE
0.0%

People of color

POPULATION SHARE
0.0%

Under age 5

POPULATION SHARE
53.1%

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.0below the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.67above 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.4below 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.1below 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.2below 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.6below 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.84in 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.28below 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.28below 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.10below 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.77above the national median
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)0well below the reference
Ozone101near the reference
Nitrogen dioxide (NO₂)5well below the reference
Diesel particulate1well below the reference
Toxic releases (RSEI)2well below the reference
Traffic proximity8well below the reference
Lead-paint risk (pre-1960 housing)91near the reference
Superfund site proximity0well below the reference
RMP-facility proximity0well below the reference
Hazardous-waste site proximity0well below the reference
Underground storage tanks0well below the reference
NPDES wastewater proximity10well below the reference
Drinking-water non-compliance85below 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.