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Community Water System · PWS OK3000606

Greenfield PWA

Greenfield, Oklahoma 73043 - drinking water served from groundwater sources to 123 people, tracked in EPA SDWIS and UCMR5.

123
People served
219
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 219 drinking-water violations at Greenfield PWA, 2% of them health-based - below the Oklahoma per-system average.

219
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
123
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Greenfield PWA

Greenfield PWA is a local-owned community water system that delivers drinking water to 123 residents in Greenfield, Oklahoma (Blaine County) through 90 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 219 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 179 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Chlorine, recorded in 67 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Oklahoma, EPA tracks 1,262 public water systems serving 3,699,452 people, with 336,706 cumulative violations and 113,804 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 266.8 violations. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%).

Greenfield PWA's 219 violations sit below the Oklahoma average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
123
Total Violations
219
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
90
County
Blaine
School/Daycare
No
MCL Violations
3
Monitoring Violations
179
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 67 2025
Revised Total Coliform Rule MON 45 2025
Coliform (TCR) MR 43 2015
Consumer Confidence Rule Other 20 2021
Lead and Copper Rule MR 10 2025
Total Haloacetic Acids (HAA5) MR 7 2020
TTHM MR 7 2020
Groundwater Rule Other 3 2010
Coliform (TCR) MCL 3 2010
LEAD AND COPPER RULE REVISIONS TT 1 2024
LEAD AND COPPER RULE REVISIONS RPT 1 2024

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Greenfield PWA.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID OK3000606 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oklahoma Drinking Water Authority

Oklahoma's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find OK regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Chlorine MR 67 SDWIS / OK3000606 / 0999
2025 Revised Total Coliform Rule MON 45 SDWIS / OK3000606 / 8000
2025 Lead and Copper Rule MR 10 SDWIS / OK3000606 / 5000
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / OK3000606 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / OK3000606 / 5200
2021 Consumer Confidence Rule Other 20 SDWIS / OK3000606 / 7000
2020 Total Haloacetic Acids (HAA5) MR 7 SDWIS / OK3000606 / 2456
2020 TTHM MR 7 SDWIS / OK3000606 / 2950
2015 Coliform (TCR) MR 43 SDWIS / OK3000606 / 3100
2010 Groundwater Rule Other 3 SDWIS / OK3000606 / 0700
2010 Coliform (TCR) MCL 3 SDWIS / OK3000606 / 3100

How Greenfield PWA Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Greenfield PWA Oklahoma avg Federal benchmark
Total violations 219 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 90.2 Indicates a contaminant exceeded a federal MCL
PFAS detection None 60.8% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 123 2,931 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,262 regulated public water systems in Oklahoma.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Greenfield PWA water safe to drink? ▼
Greenfield PWA (PWS ID: OK3000606) has 219 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 123 people using Groundwater sources.
How many people does Greenfield PWA serve? ▼
Greenfield PWA serves 123 people in Greenfield, Oklahoma. It is a Local-owned system using Groundwater water sources with 90 service connections.
What type of violations does Greenfield PWA have? ▼
Greenfield PWA has 219 total violations: 4 health-based violations (MCL exceedances or treatment failures), 179 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Greenfield PWA water? ▼
No PFAS testing data is available for Greenfield PWA under the EPA's UCMR5 monitoring program.
What water source does Greenfield PWA use? ▼
Greenfield PWA uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.