F0/100
SHAWNEE MUNICIPAL AUTHORITY — Water Quality Report 2026
Serving 29,990 people · Oklahoma
Water Source
Surface Water
County
—
System ID
OK1020504
Violations
79
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
3
Unresolved
3
Health-Related
TIER 2Unresolved
Treatment Technique Violation
TIER 2Unresolved
Treatment Technique Violation
When: April 1, 2025 – June 30, 2025Rule: Stage 1 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Treatment Technique Violation
When: January 1, 2025 – March 31, 2025Rule: Stage 1 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2024 – September 30, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2024 – September 30, 2024Rule: 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 SHAWNEE MUNICIPAL AUTHORITY
Is SHAWNEE MUNICIPAL AUTHORITY water safe to drink?
SHAWNEE MUNICIPAL AUTHORITY water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 79 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SHAWNEE MUNICIPAL AUTHORITY detected?
69 contaminants were tested in SHAWNEE MUNICIPAL AUTHORITY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SHAWNEE MUNICIPAL AUTHORITY have any EPA violations?
Yes, SHAWNEE MUNICIPAL AUTHORITY has 79 EPA violation(s) on record, with the most recent in 2025. Violation types include TT, MR, MCL. 65 are health-based violations.
How many people does SHAWNEE MUNICIPAL AUTHORITY serve?
SHAWNEE MUNICIPAL AUTHORITY serves approximately 29,990 people, Oklahoma.
What type of water does SHAWNEE MUNICIPAL AUTHORITY provide?
SHAWNEE MUNICIPAL 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 OK1020504.
How does SHAWNEE MUNICIPAL AUTHORITY compare to other utilities in Oklahoma?
SHAWNEE MUNICIPAL 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.