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Community Water System · PWS OK3006139

Pittsburg Co. RWD #20 (Carlton Landing)

Carlton Landing, Oklahoma 74432 - drinking water served from surface water sources to 38 people, tracked in EPA SDWIS and UCMR5.

38
People served
59
EPA violations
33
Health-based
Untested
UCMR5 result

The verdict

EPA records 59 drinking-water violations at Pittsburg Co. RWD #20 (Carlton Landing), 56% of them health-based - below the Oklahoma per-system average.

59
Total EPA violations on record
56%
Health-based (MCL / treatment failure)
38
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Pittsburg Co. RWD #20 (Carlton Landing)

Pittsburg Co. RWD #20 (Carlton Landing) is a private-owned community water system that delivers drinking water to 38 residents in Carlton Landing, Oklahoma (Pittsburg County) through 365 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 59 total violations for this system , of which 33 (56%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 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 TTHM, recorded in 33 violations (MCL, health-based). 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%).

Pittsburg Co. RWD #20 (Carlton Landing)'s 59 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
38
Total Violations
59
Health-Based Violations
33
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
365
County
Pittsburg
School/Daycare
No
MCL Violations
33
Monitoring Violations
24
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 33 2025
TTHM MR 10 2025
Lead and Copper Rule MR 6 2022
Chlorine MR 4 2018
Revised Total Coliform Rule MON 4 2018
Consumer Confidence Rule Other 2 2014

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 Pittsburg Co. RWD #20 (Carlton Landing).

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 OK3006139 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 TTHM MCL 33 SDWIS / OK3006139 / 2950
2025 TTHM MR 10 SDWIS / OK3006139 / 2950
2022 Lead and Copper Rule MR 6 SDWIS / OK3006139 / 5000
2018 Chlorine MR 4 SDWIS / OK3006139 / 0999
2018 Revised Total Coliform Rule MON 4 SDWIS / OK3006139 / 8000
2014 Consumer Confidence Rule Other 2 SDWIS / OK3006139 / 7000

How Pittsburg Co. RWD #20 (Carlton Landing) Compares

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

Metric Pittsburg Co. RWD #20 (Carlton Landing) Oklahoma avg Federal benchmark
Total violations 59 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 33 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 38 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 Pittsburg Co. RWD #20 (Carlton Landing) water safe to drink? ▼
Pittsburg Co. RWD #20 (Carlton Landing) (PWS ID: OK3006139) has 59 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 38 people using Surface Water sources.
How many people does Pittsburg Co. RWD #20 (Carlton Landing) serve? ▼
Pittsburg Co. RWD #20 (Carlton Landing) serves 38 people in Carlton Landing, Oklahoma. It is a Private-owned system using Surface Water water sources with 365 service connections.
What type of violations does Pittsburg Co. RWD #20 (Carlton Landing) have? ▼
Pittsburg Co. RWD #20 (Carlton Landing) has 59 total violations: 33 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Pittsburg Co. RWD #20 (Carlton Landing) water? ▼
No PFAS testing data is available for Pittsburg Co. RWD #20 (Carlton Landing) under the EPA's UCMR5 monitoring program.
What water source does Pittsburg Co. RWD #20 (Carlton Landing) use? ▼
Pittsburg Co. RWD #20 (Carlton Landing) 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.