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Community Water System · PWS OK2000703

Caddo

Caddo, Oklahoma 74729-0105 - drinking water served from groundwater sources to 944 people, tracked in EPA SDWIS and UCMR5.

944
People served
422
EPA violations
18
Health-based
Untested
UCMR5 result

The verdict

EPA records 422 drinking-water violations at Caddo, 4% of them health-based - above the Oklahoma per-system average.

422
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
944
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Caddo

Caddo is a local-owned community water system that delivers drinking water to 944 residents in Caddo, Oklahoma (Bryan County) through 603 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 422 total violations for this system , of which 18 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 372 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 Coliform (TCR), recorded in 23 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%).

Caddo's 422 violations sit above 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
944
Total Violations
422
Health-Based Violations
18
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
603
County
Bryan
School/Daycare
No
MCL Violations
16
Monitoring Violations
372
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 23 1998
Coliform (TCR) MCL 16 1998
1,2,4-Trichlorobenzene MR 16 2011
cis-1,2-Dichloroethylene MR 16 2011
Xylenes, Total MR 16 2011
o-Dichlorobenzene MR 16 2011
p-Dichlorobenzene MR 16 2011
Vinyl chloride MR 16 2011
1,1-Dichloroethylene MR 16 2011
1,1,2-Trichloroethane MR 16 2011
Ethylbenzene MR 16 2011
1,1,1-Trichloroethane MR 16 2011
Carbon tetrachloride MR 16 2011
1,2-Dichloropropane MR 16 2011
Trichloroethylene MR 16 2011
CHLOROBENZENE MR 16 2011
Styrene MR 16 2011
trans-1,2-Dichloroethylene MR 16 2011
Tetrachloroethylene MR 16 2011
Toluene MR 16 2011
DICHLOROMETHANE MR 16 2011
Benzene MR 16 2011
1,2-Dichloroethane MR 12 2011
Lead and Copper Rule MR 5 1993
Nitrate-Nitrite MR 4 2016
TTHM MR 4 2019
Total Haloacetic Acids (HAA5) MR 4 2019
LEAD AND COPPER RULE REVISIONS TT 2 2024
LEAD AND COPPER RULE REVISIONS RPT 2 2024

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 Caddo.

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 OK2000703 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 / OK2000703 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / OK2000703 / 5200
2019 TTHM MR 4 SDWIS / OK2000703 / 2950
2019 Total Haloacetic Acids (HAA5) MR 4 SDWIS / OK2000703 / 2456
2016 Nitrate-Nitrite MR 4 SDWIS / OK2000703 / 1038
2011 1,2,4-Trichlorobenzene MR 16 SDWIS / OK2000703 / 2378
2011 cis-1,2-Dichloroethylene MR 16 SDWIS / OK2000703 / 2380
2011 Xylenes, Total MR 16 SDWIS / OK2000703 / 2955
2011 o-Dichlorobenzene MR 16 SDWIS / OK2000703 / 2968
2011 p-Dichlorobenzene MR 16 SDWIS / OK2000703 / 2969
2011 Vinyl chloride MR 16 SDWIS / OK2000703 / 2976
2011 1,1-Dichloroethylene MR 16 SDWIS / OK2000703 / 2977
2011 1,1,2-Trichloroethane MR 16 SDWIS / OK2000703 / 2985
2011 Ethylbenzene MR 16 SDWIS / OK2000703 / 2992
2011 1,1,1-Trichloroethane MR 16 SDWIS / OK2000703 / 2981

How Caddo Compares

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

Metric Caddo Oklahoma avg Federal benchmark
Total violations 422 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 18 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 944 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 Caddo water safe to drink? ▼
Caddo (PWS ID: OK2000703) has 422 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 944 people using Groundwater sources.
How many people does Caddo serve? ▼
Caddo serves 944 people in Caddo, Oklahoma. It is a Local-owned system using Groundwater water sources with 603 service connections.
What type of violations does Caddo have? ▼
Caddo has 422 total violations: 18 health-based violations (MCL exceedances or treatment failures), 372 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Caddo water? ▼
No PFAS testing data is available for Caddo under the EPA's UCMR5 monitoring program.
What water source does Caddo use? ▼
Caddo 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.
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.