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OTTAWA CO RWD # 4

PWS ID: OK2005801 · FAIRLAND, Oklahoma 74343

OTTAWA CO RWD # 4 serves 652 people in FAIRLAND, Oklahoma using Groundwater water sources. It has 292 recorded EPA violations, including 6 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: OTTAWA CO RWD # 4

OTTAWA CO RWD # 4 is a local-owned community water system that delivers drinking water to 652 residents in FAIRLAND, Oklahoma (Ottawa County) through 1,422 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 292 total violations for this system , of which 6 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 282 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Glyphosate, recorded in 20 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 32 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. OTTAWA CO RWD # 4's 292 violations sit above the Oklahoma average. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
652
Total Violations
292
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,422
County
Ottawa
School/Daycare
No
MCL Violations
6
Monitoring Violations
282
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Glyphosate MR 20 2024
Chlorine MR 16 2020
Gross Alpha, Excl. Radon and U MR 14 2018
Combined Radium (-226 and -228) MR 14 2018
Gross Beta Particle Activity MR 14 2018
Combined Uranium MR 14 2018
1,2,4-Trichlorobenzene MR 8 2017
Xylenes, Total MR 8 2017
p-Dichlorobenzene MR 8 2017
Carbon tetrachloride MR 8 2017
1,2-Dichloropropane MR 8 2017
1,1,2-Trichloroethane MR 8 2017
CHLOROBENZENE MR 8 2017
cis-1,2-Dichloroethylene MR 8 2017
DICHLOROMETHANE MR 8 2017
o-Dichlorobenzene MR 8 2017
1,1-Dichloroethylene MR 8 2017
Tetrachloroethylene MR 8 2017
Benzene MR 8 2017
Toluene MR 8 2017
Ethylbenzene MR 8 2017
Styrene MR 8 2017
Trichloroethylene MR 8 2017
1,2-Dichloroethane MR 8 2017
trans-1,2-Dichloroethylene MR 8 2017
1,1,1-Trichloroethane MR 8 2017
Vinyl chloride MR 8 2017
Arsenic MR 8 2018
Coliform (TCR) MCL 6 1995
Coliform (TCR) MR 4 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 5 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
NFDHA 5/23/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/23/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFHxS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/23/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/23/2023 <0.007 µg/L 0.007 µg/L Not Detected
lithium 5/23/2023 32.0000 µg/L 9 µg/L Detected
PFDA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/23/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/23/2023 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
lithium 5/23/2023 <9 µg/L 9 µg/L Not Detected
PFHpS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/23/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/23/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 5/23/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 5/23/2023 <0.008 µg/L 0.008 µg/L Not Detected
NFDHA 5/23/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFOS 5/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 5/23/2023 <0.003 µg/L 0.003 µg/L Not Detected

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 OTTAWA CO RWD # 4.

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 OK2005801 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
2024 Glyphosate MR 20 SDWIS / OK2005801 / 2034
2020 Chlorine MR 16 SDWIS / OK2005801 / 0999
2018 Gross Alpha, Excl. Radon and U MR 14 SDWIS / OK2005801 / 4000
2018 Combined Radium (-226 and -228) MR 14 SDWIS / OK2005801 / 4010
2018 Gross Beta Particle Activity MR 14 SDWIS / OK2005801 / 4100
2018 Combined Uranium MR 14 SDWIS / OK2005801 / 4006
2018 Arsenic MR 8 SDWIS / OK2005801 / 1005
2017 1,2,4-Trichlorobenzene MR 8 SDWIS / OK2005801 / 2378
2017 Xylenes, Total MR 8 SDWIS / OK2005801 / 2955
2017 p-Dichlorobenzene MR 8 SDWIS / OK2005801 / 2969
2017 Carbon tetrachloride MR 8 SDWIS / OK2005801 / 2982
2017 1,2-Dichloropropane MR 8 SDWIS / OK2005801 / 2983
2017 1,1,2-Trichloroethane MR 8 SDWIS / OK2005801 / 2985
2017 CHLOROBENZENE MR 8 SDWIS / OK2005801 / 2989
2017 cis-1,2-Dichloroethylene MR 8 SDWIS / OK2005801 / 2380

How OTTAWA CO RWD # 4 Compares

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

Metric OTTAWA CO RWD # 4 Oklahoma avg Federal benchmark
Total violations 292 266.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 6 90.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 60.8% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 652 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is OTTAWA CO RWD # 4 water safe to drink? ▼
OTTAWA CO RWD # 4 (PWS ID: OK2005801) has 292 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 652 people using Groundwater sources.
How many people does OTTAWA CO RWD # 4 serve? ▼
OTTAWA CO RWD # 4 serves 652 people in FAIRLAND, Oklahoma. It is a Local-owned system using Groundwater water sources with 1,422 service connections.
What type of violations does OTTAWA CO RWD # 4 have? ▼
OTTAWA CO RWD # 4 has 292 total violations: 6 health-based violations (MCL exceedances or treatment failures), 282 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in OTTAWA CO RWD # 4 water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in OTTAWA CO RWD # 4's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does OTTAWA CO RWD # 4 use? ▼
OTTAWA CO RWD # 4 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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial