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Community Water System · PWS OK3005321

Nowata Co RWD #7

Coffeyville, Oklahoma 74072 - drinking water served from surface water sources to 1,050 people, tracked in EPA SDWIS and UCMR5.

1,050
People served
265
EPA violations
52
Health-based
Untested
UCMR5 result

The verdict

EPA records 265 drinking-water violations at Nowata Co RWD #7, 20% of them health-based - below the Oklahoma per-system average.

265
Total EPA violations on record
20%
Health-based (MCL / treatment failure)
1,050
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Nowata Co RWD #7

Nowata Co RWD #7 is a local-owned community water system that delivers drinking water to 1,050 residents in Coffeyville, Oklahoma (Nowata County) through 568 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 265 total violations for this system , of which 52 (20%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 163 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 Lead and Copper Rule, recorded in 88 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%).

Nowata Co RWD #7's 265 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
1,050
Total Violations
265
Health-Based Violations
52
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
568
County
Nowata
School/Daycare
No
MCL Violations
50
Monitoring Violations
163
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 88 2025
TTHM MCL 33 2024
TTHM MR 32 2025
Total Haloacetic Acids (HAA5) MR 24 2025
Consumer Confidence Rule Other 17 2025
Coliform (TCR) MR 16 2009
Public Notice Other 16 2024
Total Haloacetic Acids (HAA5) MCL 15 2025
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 3 2010
LEAD AND COPPER RULE REVISIONS TT 2 2024
LEAD AND COPPER RULE REVISIONS RPT 2 2024
Coliform (TCR) MCL 2 1994
Revised Total Coliform Rule Other 1 2016

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 Nowata Co RWD #7.

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 OK3005321 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 Lead and Copper Rule MR 88 SDWIS / OK3005321 / 5000
2025 TTHM MR 32 SDWIS / OK3005321 / 2950
2025 Total Haloacetic Acids (HAA5) MR 24 SDWIS / OK3005321 / 2456
2025 Consumer Confidence Rule Other 17 SDWIS / OK3005321 / 7000
2025 Total Haloacetic Acids (HAA5) MCL 15 SDWIS / OK3005321 / 2456
2024 TTHM MCL 33 SDWIS / OK3005321 / 2950
2024 Public Notice Other 16 SDWIS / OK3005321 / 7500
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / OK3005321 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / OK3005321 / 5200
2016 Revised Total Coliform Rule Other 1 SDWIS / OK3005321 / 8000
2010 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 3 SDWIS / OK3005321 / 0600
2009 Coliform (TCR) MR 16 SDWIS / OK3005321 / 3100
1994 Coliform (TCR) MCL 2 SDWIS / OK3005321 / 3100

How Nowata Co RWD #7 Compares

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

Metric Nowata Co RWD #7 Oklahoma avg Federal benchmark
Total violations 265 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 52 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 1,050 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 Nowata Co RWD #7 water safe to drink? ▼
Nowata Co RWD #7 (PWS ID: OK3005321) has 265 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,050 people using Surface Water sources.
How many people does Nowata Co RWD #7 serve? ▼
Nowata Co RWD #7 serves 1,050 people in Coffeyville, Oklahoma. It is a Local-owned system using Surface Water water sources with 568 service connections.
What type of violations does Nowata Co RWD #7 have? ▼
Nowata Co RWD #7 has 265 total violations: 52 health-based violations (MCL exceedances or treatment failures), 163 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Nowata Co RWD #7 water? ▼
No PFAS testing data is available for Nowata Co RWD #7 under the EPA's UCMR5 monitoring program.
What water source does Nowata Co RWD #7 use? ▼
Nowata Co RWD #7 uses Surface Water 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.