PlainWater
States → Oklahoma

Community Water System · PWS OK3002109

West Siloam Springs

Colcord, Oklahoma 74338 - drinking water served from surface water sources to 877 people, tracked in EPA SDWIS and UCMR5.

877
People served
130
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 130 drinking-water violations at West Siloam Springs, 2% of them health-based - below the Oklahoma per-system average.

130
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
877
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: West Siloam Springs

West Siloam Springs is a local-owned community water system that delivers drinking water to 877 residents in Colcord, Oklahoma (Delaware County) through 429 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 130 total violations for this system , of which 2 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 98 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 Coliform (TCR), recorded in 22 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%).

West Siloam Springs's 130 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
877
Total Violations
130
Health-Based Violations
2
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
429
County
Delaware
School/Daycare
No
MCL Violations
0
Monitoring Violations
98
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 22 2005
Lead and Copper Rule MR 22 2024
Total Haloacetic Acids (HAA5) MR 20 2024
TTHM MR 20 2024
Chlorine MR 11 2025
Consumer Confidence Rule Other 4 2022
Revised Total Coliform Rule MON 3 2025
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 West Siloam Springs.

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 OK3002109 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 Chlorine MR 11 SDWIS / OK3002109 / 0999
2025 Revised Total Coliform Rule MON 3 SDWIS / OK3002109 / 8000
2024 Lead and Copper Rule MR 22 SDWIS / OK3002109 / 5000
2024 Total Haloacetic Acids (HAA5) MR 20 SDWIS / OK3002109 / 2456
2024 TTHM MR 20 SDWIS / OK3002109 / 2950
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / OK3002109 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / OK3002109 / 5200
2022 Consumer Confidence Rule Other 4 SDWIS / OK3002109 / 7000
2005 Coliform (TCR) MR 22 SDWIS / OK3002109 / 3100

How West Siloam Springs Compares

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

Metric West Siloam Springs Oklahoma avg Federal benchmark
Total violations 130 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 877 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 West Siloam Springs water safe to drink? ▼
West Siloam Springs (PWS ID: OK3002109) has 130 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 877 people using Surface Water sources.
How many people does West Siloam Springs serve? ▼
West Siloam Springs serves 877 people in Colcord, Oklahoma. It is a Local-owned system using Surface Water water sources with 429 service connections.
What type of violations does West Siloam Springs have? ▼
West Siloam Springs has 130 total violations: 2 health-based violations (MCL exceedances or treatment failures), 98 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in West Siloam Springs water? ▼
No PFAS testing data is available for West Siloam Springs under the EPA's UCMR5 monitoring program.
What water source does West Siloam Springs use? ▼
West Siloam Springs 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.