Public water system record
Andesite Ridge Water System
On record as serving Big Sky, Madison County, MT · Serves 450 people
Federal records show no health-based violations and 1 monitoring/reporting issue for Andesite Ridge Water System in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Andesite Ridge Water System buys its water from Big Sky County Water and Sewer Dist 363.
- Record on file since 2006, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 284 service lines.
Check whether Andesite Ridge Water System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
Full record since 2006
EPA's records for Andesite Ridge Water System go back to 2006. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 1 | 3 |
| 2010 to October 18, 2016 | 3 | 2 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began February 2015, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2015 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Jul 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2007 | Resolved |
Where the water comes from
Andesite Ridge Water System buys its water from Big Sky County Water and Sewer Dist 363. It lists no wells or intakes of its own.
Buys water from
- Big Sky County Water and Sewer Dist 363 Big Sky, MT
Annual water quality report
Andesite Ridge Water System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Andesite Ridge Water System for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Montana.
Certified drinking water labs by state EPA guidance for private wells