Ryan Dam Water System
PWSID: MT0000046
System Details
| Population Served | 230 |
| Service Connections | 14 |
| Water Source | Groundwater |
| System Type | Community Water System |
| Owner | Private |
| Status | Active |
| City | Helena |
| Zip Code | 59620-0901 |
Areas Served
- Great Falls, Cascade County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|
| Lead (90th percentile) | 0.0220 mg/L | 0.015 mg/L | EXCEEDS Action Level |
| Lead (90th percentile) | 0.0020 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0010 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 mg/L | 0.015 mg/L | Below Action Level |
Violation History (18 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|
| | 2023-05-24 | Yes | Returned to Compliance |
| | 2023-05-24 | Yes | Returned to Compliance |
| | 2023-04-20 | Major | Returned to Compliance |
| | 2023-04-20 | Major | Returned to Compliance |
| | 2023-04-20 | Major | Returned to Compliance |
| | 2023-01-01 | Major | Acknowledged |
| | 2023-01-01 | Major | Acknowledged |
| | 2019-07-01 | | Returned to Compliance |
| | 2019-07-01 | Major | Returned to Compliance |
| | 2019-07-01 | Major | Returned to Compliance |
| | 2018-07-01 | Major | Returned to Compliance |
| | 2018-07-01 | Major | Returned to Compliance |
| | 2012-10-01 | | Returned to Compliance |
| | 2008-07-01 | | Returned to Compliance |
| | 2008-01-01 | Major | Returned to Compliance |
| | 2008-01-01 | Major | Returned to Compliance |
| | 2004-10-01 | | Returned to Compliance |
| | 1993-07-01 | | Returned to Compliance |