Public water system record
Mountain Ridge
On record as serving Kittitas County, WA · Serves 28 people
Federal records show 1 health-based violation and no monitoring/reporting issues for Mountain Ridge in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Mountain Ridge draws water from 1 well.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 125.61 µg/L, federal limit 80 µg/L (1.6 times the limit), 2025.
- Most recent formal enforcement: compliance order (no penalty) by Washington, December 2025.
Check whether Mountain Ridge 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 125.61 µg/L, federal limit 80 µg/L (1.6 times the limit)
|
220 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Enforcement actions
Washington regulators took 1 formal enforcement action against Mountain Ridge in 2025. The most recent was a compliance order (no penalty) in December 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 12, 2025 | Washington | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
What the violations mean
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Mountain Ridge draws water from 1 well.
Annual water quality report
Mountain Ridge 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 Mountain Ridge 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 Washington.
Certified drinking water labs by state EPA guidance for private wells