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LOGAN CO RWD #1

PWS ID: OK2004207 · GUTHRIE, Oklahoma 73044

LOGAN CO RWD #1 serves 8,907 people in GUTHRIE, Oklahoma using Surface Water water sources. It has 316 recorded EPA violations, including 107 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (6 compounds found).

Water Quality Snapshot: LOGAN CO RWD #1

LOGAN CO RWD #1 is a local-owned community water system that delivers drinking water to 8,907 residents in GUTHRIE, Oklahoma (Logan County) through 4,424 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 316 total violations for this system , of which 107 (34%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 193 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 Combined Uranium, recorded in 60 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 6 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 17.1 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. LOGAN CO RWD #1's 316 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

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

Population Served
8,907
Total Violations
316
Health-Based Violations
107
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
4,424
County
Logan
School/Daycare
No
MCL Violations
105
Monitoring Violations
193
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Uranium MCL 60 2012
Gross Alpha, Excl. Radon and U MCL 36 2011
Coliform (TCR) MCL 9 1991
1,2,4-Trichlorobenzene MR 9 2012
Xylenes, Total MR 9 2012
o-Dichlorobenzene MR 9 2012
p-Dichlorobenzene MR 9 2012
1,1-Dichloroethylene MR 9 2012
1,2-Dichloroethane MR 9 2012
1,1,1-Trichloroethane MR 9 2012
1,2-Dichloropropane MR 9 2012
1,1,2-Trichloroethane MR 9 2012
Tetrachloroethylene MR 9 2012
CHLOROBENZENE MR 9 2012
Ethylbenzene MR 9 2012
cis-1,2-Dichloroethylene MR 9 2012
DICHLOROMETHANE MR 9 2012
trans-1,2-Dichloroethylene MR 9 2012
Carbon tetrachloride MR 9 2012
Trichloroethylene MR 9 2012
Benzene MR 9 2012
Styrene MR 9 2012
Vinyl chloride MR 9 2012
Toluene MR 9 2012
Glyphosate MR 4 2005
LEAD AND COPPER RULE REVISIONS TT 2 2024
LEAD AND COPPER RULE REVISIONS RPT 2 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 19 of 840 samples detected PFAS.

Contaminant Date Result MRL Status
11Cl-PF3OUdS 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 9/9/2024 0.0059 µg/L 0.003 µg/L Detected
PFHpA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 9/9/2024 0.0041 µg/L 0.004 µg/L Detected
PFDA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/9/2024 0.0074 µg/L 0.003 µg/L Detected
PFMBA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/9/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/9/2024 0.0063 µg/L 0.003 µg/L Detected
PFBA 9/9/2024 0.0089 µg/L 0.005 µg/L Detected
lithium 7/9/2024 <9 µg/L 9 µg/L Not Detected
PFTrDA 7/9/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 7/9/2024 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 7/9/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 7/9/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/9/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 7/9/2024 <9 µg/L 9 µg/L Not Detected
PFTA 7/9/2024 <0.008 µg/L 0.008 µg/L Not Detected
11Cl-PF3OUdS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/9/2024 <0.004 µg/L 0.004 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 LOGAN CO RWD #1.

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 OK2004207 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 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / OK2004207 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / OK2004207 / 5200
2012 Combined Uranium MCL 60 SDWIS / OK2004207 / 4006
2012 1,2,4-Trichlorobenzene MR 9 SDWIS / OK2004207 / 2378
2012 Xylenes, Total MR 9 SDWIS / OK2004207 / 2955
2012 o-Dichlorobenzene MR 9 SDWIS / OK2004207 / 2968
2012 p-Dichlorobenzene MR 9 SDWIS / OK2004207 / 2969
2012 1,1-Dichloroethylene MR 9 SDWIS / OK2004207 / 2977
2012 1,2-Dichloroethane MR 9 SDWIS / OK2004207 / 2980
2012 1,1,1-Trichloroethane MR 9 SDWIS / OK2004207 / 2981
2012 1,2-Dichloropropane MR 9 SDWIS / OK2004207 / 2983
2012 1,1,2-Trichloroethane MR 9 SDWIS / OK2004207 / 2985
2012 Tetrachloroethylene MR 9 SDWIS / OK2004207 / 2987
2012 CHLOROBENZENE MR 9 SDWIS / OK2004207 / 2989
2012 Ethylbenzene MR 9 SDWIS / OK2004207 / 2992

How LOGAN CO RWD #1 Compares

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

Metric LOGAN CO RWD #1 Oklahoma avg Federal benchmark
Total violations 316 266.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 107 90.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 6 compounds 60.8% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 8,907 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 LOGAN CO RWD #1 water safe to drink? ▼
LOGAN CO RWD #1 (PWS ID: OK2004207) has 316 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 6 PFAS compounds found. This system serves 8,907 people using Surface Water sources.
How many people does LOGAN CO RWD #1 serve? ▼
LOGAN CO RWD #1 serves 8,907 people in GUTHRIE, Oklahoma. It is a Local-owned system using Surface Water water sources with 4,424 service connections.
What type of violations does LOGAN CO RWD #1 have? ▼
LOGAN CO RWD #1 has 316 total violations: 107 health-based violations (MCL exceedances or treatment failures), 193 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in LOGAN CO RWD #1 water? ▼
Yes. UCMR5 testing detected 6 PFAS compounds in LOGAN CO RWD #1's water supply: PFBS, PFOA, PFPeA, PFHxA, PFBA, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does LOGAN CO RWD #1 use? ▼
LOGAN CO RWD #1 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