F0/100
MOUNTAIN WSD — Water Quality Report 2026
Serving 1,941 people · Colorado
Water Source
Groundwater Under Influence of Surface Water
County
—
System ID
CO0130100
Violations
65
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – July 15, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – October 31, 2024Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – October 31, 2024Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 1 — URGENTResolved
Violation related to Nitrate
When: May 1, 2024 – May 31, 2024Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About MOUNTAIN WSD
Is MOUNTAIN WSD water safe to drink?
MOUNTAIN WSD water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 65 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MOUNTAIN WSD detected?
1 contaminants were tested in MOUNTAIN WSD's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MOUNTAIN WSD have any EPA violations?
Yes, MOUNTAIN WSD has 65 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, TT. 12 are health-based violations.
How many people does MOUNTAIN WSD serve?
MOUNTAIN WSD serves approximately 1,941 people, Colorado.
What type of water does MOUNTAIN WSD provide?
MOUNTAIN WSD sources its water from groundwater under influence of surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CO0130100.
How does MOUNTAIN WSD compare to other utilities in Colorado?
MOUNTAIN WSD scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Colorado state page for a full comparison of water systems.