Sardis Lake Water Authority
PWSID: OK1010319
This system has no unresolved violations. The most recent violation on record was 2025-07-01.
This system has more violations on record than 96% of water systems in Oklahoma.
Violation trend: 24.0 per year over the last 5 years, down from 38.0 per year in the previous 5.
System Details
| Population Served | 307 |
| Service Connections | 322 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Clayton |
| EPA ZIP on File | 74536 |
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Copper (90th percentile) | 2.1690 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 2.0300 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 1.4450 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 1.4250 mg/L | 1.300 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0509 mg/L | 0.015 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0103 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0093 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0091 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0079 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0072 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0058 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0055 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0044 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0028 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0027 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0019 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0013 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0006 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0006 mg/L | 0.015 mg/L | Below Action Level |
Violation History (419 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 0300 | TT | 2025-07-01 | Yes | Acknowledged |
| 0300 | MR | 2025-07-01 | Acknowledged | |
| 0300 | TT | 2025-06-01 | Yes | Acknowledged |
| 0300 | TT | 2025-06-01 | Yes | Acknowledged |
| 0300 | TT | 2025-03-01 | Yes | Acknowledged |
| 0300 | TT | 2025-03-01 | Yes | Acknowledged |
| 0200 | TT | 2025-01-01 | Yes | Acknowledged |
| 0300 | TT | 2024-04-01 | Yes | Acknowledged |
| 0300 | TT | 2024-04-01 | Yes | Acknowledged |
| 0300 | TT | 2024-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0610 MG/L (limit: 0.0600 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0610 MG/L (limit: 0.0600 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0610 MG/L (limit: 0.0600 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 0200 | TT | 2023-07-01 | Yes | Acknowledged |
| 0200 | TT | 2023-07-01 | Yes | Acknowledged |
| 0200 | TT | 2023-07-01 | Yes | Acknowledged |
| 0200 | TT | 2023-07-01 | Yes | Acknowledged |
| 0300 | TT | 2023-01-01 | Yes | Acknowledged |
| 0300 | TT | 2023-01-01 | Yes | Acknowledged |
| 0300 | TT | 2023-01-01 | Yes | Acknowledged |
| 0300 | TT | 2023-01-01 | Yes | Acknowledged |
| 0300 | TT | 2022-08-01 | Yes | Acknowledged |
| 0300 | TT | 2022-08-01 | Yes | Acknowledged |
| 0300 | TT | 2022-08-01 | Yes | Acknowledged |
| 0300 | TT | 2022-08-01 | Yes | Acknowledged |
| 0300 | TT | 2022-08-01 | Yes | Acknowledged |
| 0300 | TT | 2022-08-01 | Yes | Acknowledged |
| 0200 | TT | 2022-08-01 | Yes | Acknowledged |
| 0200 | TT | 2022-08-01 | Yes | Acknowledged |
| 0300 | TT | 2022-07-01 | Yes | Acknowledged |
| 0300 | TT | 2022-07-01 | Yes | Acknowledged |
| 0300 | TT | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0880 MG/L (limit: 0.0800 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0880 MG/L (limit: 0.0800 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0880 MG/L (limit: 0.0800 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Returned to Compliance |
| 0300 | TT | 2022-06-01 | Yes | Returned to Compliance |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Returned to Compliance |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
| 0300 | TT | 2022-06-01 | Yes | Acknowledged |
Showing 50 of 419 historical violations.
Understanding This Water System's Record
Sardis Lake Water Authority is a community water system water system that draws from surface water sources and serves a population of 307 in Clayton, Oklahoma. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.
What Do These Violations Mean?
Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.
What Should You Do?
Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.