HIDDEN LAKE COLONY Water Quality Report
Population
80
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 26
violations recorded
C
Fair
Safety Grade
26 violations in the past 5 years, including 2 health-based
System Details
- PWSID
- MT0003932
- Population Served
- 80
- Water Source
- Ground Water
- Owner
- Private
- State
- Montana
- EPA Region
- 8
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 0700 | ⚠ Monitoring/Reporting | 5 |
| Arsenic | ✕ Health-Based | 5 |
| Antimony | ✕ Health-Based | 2 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 15 |
| Radium-226 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2005 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2010 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2015 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2020 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2031 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2035 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2036 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2037 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2039 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2040 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2041 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2042 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2046 | ⚠ Monitoring/Reporting | 1 |
| Atrazine | ⚠ Monitoring/Reporting | 1 |
| Benzene | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2065 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2067 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2105 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2110 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2274 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2306 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2326 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2959 | ⚠ Monitoring/Reporting | 1 |
| Gross Alpha | ⚠ Monitoring/Reporting | 1 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 4 |
| Beryllium | ⚠ Monitoring/Reporting | 5 |
| Total Coliform | ⚠ Monitoring/Reporting | 3 |
Violation History
2025
1
2024
7
2023
10
2022
7
2021
1
2020
4
2019
25
2017
3
2016
5
2015
1
Total violations on record: 64
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: Arsenic, Radium-226
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Atrazine, Benzene
Water Distiller
Removes heavy metals, minerals, and most contaminants through evaporation
Removes: Arsenic
UV Water Purifier
Kills bacteria and viruses without chemicals
Removes: Total Coliform
How does this compare?
This systemNational average
Grade C
Avg: B-C
64violations total
229% of national average
National avg: ~28 per system
🏘️ Small community water system.