RYAN DAM WATER SYSTEM Water Quality Report
Population
230
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
Top 94%
of 49,184 US systems
5-Year Record
⚠️ 7
violations recorded
D
Poor
Safety Grade
7 violations in the past 5 years, including 2 health-based
System Details
- PWSID
- MT0000046
- Population Served
- 230
- Water Source
- Ground Water
- Owner
- Private
- State
- Montana
- EPA Region
- 8
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ⚠ Monitoring/Reporting | 3 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 2 |
| Gross Alpha | ⚠ Monitoring/Reporting | 1 |
| Radium-226 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 0700 | ⚠ Monitoring/Reporting | 4 |
| Total Coliform | ⚠ Monitoring/Reporting | 3 |
| Contaminant 8000 | ✕ Health-Based | 2 |
| Total Trihalomethanes (TTHMs) | ⚠ Monitoring/Reporting | 1 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 1 |
Violation History
2023
7
2019
3
2018
2
2012
1
2008
3
2004
1
1993
1
Total violations on record: 18
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Reverse Osmosis System
Removes up to 99% of contaminants including PFAS, lead, arsenic, and nitrates
Removes: Radium-226
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
UV Water Purifier
Kills bacteria and viruses without chemicals
Removes: Total Coliform
How does this compare?
This systemNational average
Grade D
Avg: B-C
18violations total
64% of national average
National avg: ~28 per system
🏘️ Small community water system.