Klawock
PWSID: AK2120169
This system has no unresolved violations. The most recent violation on record was 2025-07-01.
This system has more violations on record than 93% of water systems in Alaska.
Violation trend: 10.6 per year over the last 5 years, down from 14.6 per year in the previous 5.
System Details
| Population Served | 904 |
| Service Connections | 1,084 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Native American |
| Status | Active |
| City | Klawock |
| EPA ZIP on File | 99925 |
Areas Served
- Klawock
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0055 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0036 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0033 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0028 mg/L | 0.015 mg/L | Below Action Level |
Violation History (282 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 2456 | MCL Measured: 0.0870 MG/L (limit: 0.0600 MG/L) | 2025-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0920 MG/L (limit: 0.0600 MG/L) | 2025-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0930 MG/L (limit: 0.0600 MG/L) | 2025-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0930 MG/L (limit: 0.0600 MG/L) | 2025-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0950 MG/L (limit: 0.0600 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0930 MG/L (limit: 0.0600 MG/L) | 2024-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0930 MG/L (limit: 0.0600 MG/L) | 2024-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0820 MG/L (limit: 0.0600 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0820 MG/L (limit: 0.0600 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 0300 | MR | 2024-04-01 | Major | Returned to Compliance |
| 0300 | MR | 2024-04-01 | Major | Returned to Compliance |
| 0200 | MR | 2024-04-01 | Major | Returned to Compliance |
| 0200 | MR | 2024-04-01 | Major | Returned to Compliance |
| 2456 | MCL Measured: 0.0880 MG/L (limit: 0.0600 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0880 MG/L (limit: 0.0600 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0880 MG/L (limit: 0.0600 MG/L) | 2024-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0810 MG/L (limit: 0.0600 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0810 MG/L (limit: 0.0600 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0810 MG/L (limit: 0.0600 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0810 MG/L (limit: 0.0600 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0810 MG/L (limit: 0.0600 MG/L) | 2023-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0770 MG/L (limit: 0.0600 MG/L) | 2023-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0770 MG/L (limit: 0.0600 MG/L) | 2023-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0770 MG/L (limit: 0.0600 MG/L) | 2023-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0780 MG/L (limit: 0.0600 MG/L) | 2023-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0780 MG/L (limit: 0.0600 MG/L) | 2023-04-01 | Yes | Acknowledged |
| 0200 | MR | 2023-01-01 | Major | Acknowledged |
| 2456 | MCL Measured: 0.0640 MG/L (limit: 0.0600 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0640 MG/L (limit: 0.0600 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0640 MG/L (limit: 0.0600 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 0300 | MR | 2022-10-01 | Major | Returned to Compliance |
| 0300 | MR | 2022-10-01 | Major | Returned to Compliance |
| 0300 | MR | 2022-10-01 | Major | Acknowledged |
| 0300 | MR | 2022-10-01 | Major | Returned to Compliance |
| 0200 | MR | 2022-10-01 | Major | Returned to Compliance |
| 0200 | MR | 2022-10-01 | Major | Returned to Compliance |
| 0200 | MR | 2022-10-01 | Major | Acknowledged |
| 0200 | MR | 2022-10-01 | Major | Returned to Compliance |
| 2456 | MCL Measured: 0.0640 MG/L (limit: 0.0600 MG/L) | 2022-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0640 MG/L (limit: 0.0600 MG/L) | 2022-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0640 MG/L (limit: 0.0600 MG/L) | 2022-10-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0650 MG/L (limit: 0.0600 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0650 MG/L (limit: 0.0600 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0650 MG/L (limit: 0.0600 MG/L) | 2022-07-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0740 MG/L (limit: 0.0600 MG/L) | 2022-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0740 MG/L (limit: 0.0600 MG/L) | 2022-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0740 MG/L (limit: 0.0600 MG/L) | 2022-04-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0820 MG/L (limit: 0.0600 MG/L) | 2022-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 0.0820 MG/L (limit: 0.0600 MG/L) | 2022-01-01 | Yes | Acknowledged |
| 7000 | Other | 2021-10-01 | Returned to Compliance |
Showing 50 of 282 historical violations.
Understanding This Water System's Record
Klawock is a community water system water system that draws from surface water sources and serves a population of 904 in Klawock, Alaska. 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.