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EL RENO

PWS ID: OK2000902 · EL RENO, Oklahoma 73036

EL RENO serves 16,212 people in EL RENO, Oklahoma using Surface Water water sources. It has 340 recorded EPA violations, including 146 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: EL RENO

EL RENO is a local-owned community water system that delivers drinking water to 16,212 residents in EL RENO, Oklahoma (Canadian County) through 6,093 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 340 total violations for this system , of which 146 (43%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 186 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 TTHM, recorded in 89 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 132 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. EL RENO's 340 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
16,212
Total Violations
340
Health-Based Violations
146
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
6,093
County
Canadian
School/Daycare
No
MCL Violations
97
Monitoring Violations
186
Treatment Tech Violations
49

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 89 2024
Surface Water Treatment Rule TT 27 2022
Interim Enhanced Surface Water Treatment Rule TT 20 2022
TTHM MR 19 2013
Total Haloacetic Acids (HAA5) MR 19 2013
Coliform (TCR) MR 10 2010
Interim Enhanced Surface Water Treatment Rule MR 8 2022
Coliform (TCR) MCL 8 2011
CARBON, TOTAL MR 6 2006
cis-1,2-Dichloroethylene MR 4 2015
DICHLOROMETHANE MR 4 2015
Vinyl chloride MR 4 2015
1,1-Dichloroethylene MR 4 2015
1,1,1-Trichloroethane MR 4 2015
Carbon tetrachloride MR 4 2015
1,2-Dichloropropane MR 4 2015
CHLOROBENZENE MR 4 2015
Toluene MR 4 2015
Styrene MR 4 2015
Cadmium MR 4 2016
Chromium MR 4 2016
Mercury MR 4 2016
Antimony, Total MR 4 2016
Beryllium, Total MR 4 2016
Thallium, Total MR 4 2016
Selenium MR 4 2016
1,1,2-Trichloroethane MR 4 2015
Benzene MR 4 2015
trans-1,2-Dichloroethylene MR 4 2015
Nickel MR 4 2016

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 7/2/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/2/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFDoA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/2/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 7/2/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFNA 7/2/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/2/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/2/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 7/2/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/2/2025 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 7/2/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/2/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 7/2/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/2/2025 <0.02 µg/L 0.02 µg/L Not Detected
lithium 7/2/2025 118.0000 µg/L 9 µg/L Detected
PFMBA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/2/2025 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/2/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/2/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/2/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/2/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/1/2025 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 4/1/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/1/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/1/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 4/1/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/1/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/1/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 4/1/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/1/2025 <0.004 µg/L 0.004 µg/L Not Detected
lithium 4/1/2025 132.0000 µg/L 9 µg/L Detected
4:2 FTS 4/1/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 4/1/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 4/1/2025 <0.005 µg/L 0.005 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 EL RENO.

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 OK2000902 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 TTHM MCL 89 SDWIS / OK2000902 / 2950
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / OK2000902 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / OK2000902 / 5200
2022 Surface Water Treatment Rule TT 27 SDWIS / OK2000902 / 0200
2022 Interim Enhanced Surface Water Treatment Rule TT 20 SDWIS / OK2000902 / 0300
2022 Interim Enhanced Surface Water Treatment Rule MR 8 SDWIS / OK2000902 / 0300
2016 Cadmium MR 4 SDWIS / OK2000902 / 1015
2016 Chromium MR 4 SDWIS / OK2000902 / 1020
2016 Mercury MR 4 SDWIS / OK2000902 / 1035
2016 Antimony, Total MR 4 SDWIS / OK2000902 / 1074
2016 Beryllium, Total MR 4 SDWIS / OK2000902 / 1075
2016 Thallium, Total MR 4 SDWIS / OK2000902 / 1085
2016 Selenium MR 4 SDWIS / OK2000902 / 1045
2016 Nickel MR 4 SDWIS / OK2000902 / 1036
2016 Barium MR 4 SDWIS / OK2000902 / 1010

How EL RENO Compares

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

Metric EL RENO Oklahoma avg Federal benchmark
Total violations 340 266.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 146 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 16,212 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 EL RENO water safe to drink? ▼
EL RENO (PWS ID: OK2000902) has 340 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 16,212 people using Surface Water sources.
How many people does EL RENO serve? ▼
EL RENO serves 16,212 people in EL RENO, Oklahoma. It is a Local-owned system using Surface Water water sources with 6,093 service connections.
What type of violations does EL RENO have? ▼
EL RENO has 340 total violations: 146 health-based violations (MCL exceedances or treatment failures), 186 monitoring/reporting violations, and 49 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in EL RENO water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in EL RENO's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does EL RENO use? ▼
EL RENO 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.

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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 PlainWater Editorial