Oklahoma · drinking water · SDWIS through latest publish

Davis Water Quality — Davis, Oklahoma

PWSID OK1010822 · Surface waterMunicipal

2,610 people served. 15 health-based SDWIS violations recorded in the past 5 years. 21 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.19 violations'20'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0300

Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0300

Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0200

Unresolved Surface Water Treatment Rule violation cited in 2025 (contaminant 0200).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0200

Unresolved Surface Water Treatment Rule violation cited in 2025 (contaminant 0200).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 109412 citations
  • Bromate10 citations
  • Contaminant 02006 citations
  • Contaminant 03004 citations
  • Total Trihalomethanes (TTHM)4 citations
  • Contaminant 20324 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.

HEALTH-BASED · CONTAMINANT 0300UNRESOLVED

2025 · Contaminant 0300 · Long Term 1 Enhanced SWTR

Treatment technique violation

CONTAMINANT CODE 0300

HEALTH-BASED · CONTAMINANT 0300

2025 · Contaminant 0300 · Long Term 1 Enhanced SWTR

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0300

HEALTH-BASED · CONTAMINANT 0300UNRESOLVED

2025 · Contaminant 0300 · Long Term 1 Enhanced SWTR

Treatment technique violation

CONTAMINANT CODE 0300

HEALTH-BASED · CONTAMINANT 0300

2025 · Contaminant 0300 · Long Term 1 Enhanced SWTR

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0300

HEALTH-BASED · CONTAMINANT 0200UNRESOLVED

2025 · Contaminant 0200 · Surface Water Treatment Rule

Treatment technique violation

CONTAMINANT CODE 0200

HEALTH-BASED · CONTAMINANT 0200

2025 · Contaminant 0200 · Surface Water Treatment Rule

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0200

HEALTH-BASED · CONTAMINANT 0200UNRESOLVED

2025 · Contaminant 0200 · Surface Water Treatment Rule

Treatment technique violation

CONTAMINANT CODE 0200

HEALTH-BASED · CONTAMINANT 0200

2025 · Contaminant 0200 · Surface Water Treatment Rule

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0200

HEALTH-BASED · CONTAMINANT 0200UNRESOLVED

2025 · Contaminant 0200 · Surface Water Treatment Rule

Treatment technique violation

CONTAMINANT CODE 0200

HEALTH-BASED · CONTAMINANT 0200

2025 · Contaminant 0200 · Surface Water Treatment Rule

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0200

MONITORING · BROMATE

2025 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

2025 · Bromate · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · 2,4-D

2024 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2050

MONITORING · 2,4-DUNRESOLVED

2024 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · 2,4-D

2024 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2050

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 · 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

MONITORING · BROMATE

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATEUNRESOLVED

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

Failure to monitor as scheduled

CONTAMINANT CODE 2920

MONITORING · BROMATE

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATE

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · BROMATEUNRESOLVED

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

Failure to monitor as scheduled

CONTAMINANT CODE 2920

MONITORING · BROMATE

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

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2920

MONITORING · CONTAMINANT 1094

2023 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094UNRESOLVED

2023 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094

2023 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 2032

2023 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2032UNRESOLVED

2023 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2032UNRESOLVED

2023 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2032

2023 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 1094UNRESOLVED

2022 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094UNRESOLVED

2022 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094

2022 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094UNRESOLVED

2022 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094UNRESOLVED

2021 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094UNRESOLVED

2021 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1094

MONITORING · CONTAMINANT 1094

2021 · Contaminant 1094 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1094

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

MONITORING · CHLORINE

2020 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

MONITORING · CHLORINE

2020 · Chlorine · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0999

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

Who Drinks This Water

Davis, Oklahoma (Census place; block-group disparity scores aggregated by centroid containment): a service population of 2,821. Local disparity score for pm2.5 (fine particulate) sits below the reference (89). Why we surface this →

POPULATION SHARE
21.7%

Low-income

POPULATION SHARE
31.8%

People of color

POPULATION SHARE
6.3%

Under age 5

POPULATION SHARE
20.0%

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.76above the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.54near 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.21below 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.22below 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.15below 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.61above 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.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.62above 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.22below 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.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)89below the reference
Ozone82below the reference
Nitrogen dioxide (NO₂)39well below the reference
Diesel particulate26well below the reference
Toxic releases (RSEI)24well below the reference
Traffic proximity19well below the reference
Lead-paint risk (pre-1960 housing)57below the reference
Superfund site proximity0well below the reference
RMP-facility proximity0well below the reference
Hazardous-waste site proximity0well below the reference
Underground storage tanks63below the reference
NPDES wastewater proximity24well below the reference
Drinking-water non-compliance106near 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.