F0/100
STILLWATER UTILITIES AUTHORITY — Water Quality Report 2026
Serving 53,000 people · Oklahoma
Water Source
Surface Water
County
—
System ID
OK1021220
Violations
48
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.006 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
6
Violations (last 5yr)
0
Unresolved
6
Health-Related
TIER 2Resolved
Failed treatment technique requirements
When: February 1, 2023 – February 28, 2023Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 2Resolved
Failed treatment technique requirements
When: February 1, 2023 – February 28, 2023Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 2Resolved
Treatment Technique Violation
When: October 1, 2022 – December 31, 2022Rule: Stage 1 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Treatment Technique Violation
When: July 1, 2022 – September 30, 2022Rule: Stage 1 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Treatment Technique Violation
When: January 1, 2022 – March 31, 2022Rule: Stage 1 DBPREnforcement: Formal — state order issued
TIER 2Resolved
Treatment Technique Violation
When: October 1, 2021 – December 31, 2021Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About STILLWATER UTILITIES AUTHORITY
Is STILLWATER UTILITIES AUTHORITY water safe to drink?
STILLWATER UTILITIES AUTHORITY water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 48 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has STILLWATER UTILITIES AUTHORITY detected?
69 contaminants were tested in STILLWATER UTILITIES AUTHORITY's water. Notable contaminants include PFOS, Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does STILLWATER UTILITIES AUTHORITY have any EPA violations?
Yes, STILLWATER UTILITIES AUTHORITY has 48 EPA violation(s) on record, with the most recent in 2023. Violation types include TT, MR, MCL. 31 are health-based violations.
How many people does STILLWATER UTILITIES AUTHORITY serve?
STILLWATER UTILITIES AUTHORITY serves approximately 53,000 people, Oklahoma.
What type of water does STILLWATER UTILITIES AUTHORITY provide?
STILLWATER UTILITIES AUTHORITY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OK1021220.
How does STILLWATER UTILITIES AUTHORITY compare to other utilities in Oklahoma?
STILLWATER UTILITIES AUTHORITY scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Oklahoma state page for a full comparison of water systems.