F18/100
STAR VALLEY RANCH, TOWN OF — Water Quality Report 2026
Serving 2,030 people · Wyoming
Water Source
Groundwater
County
—
System ID
WY5600287
Violations
51
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.008 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Monitoring violation
When: April 21, 2023Rule: Total Coliform RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 STAR VALLEY RANCH, TOWN OF
Is STAR VALLEY RANCH, TOWN OF water safe to drink?
STAR VALLEY RANCH, TOWN OF water receives a grade of F (18/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 51 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has STAR VALLEY RANCH, TOWN OF detected?
1 contaminants were tested in STAR VALLEY RANCH, TOWN OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does STAR VALLEY RANCH, TOWN OF have any EPA violations?
Yes, STAR VALLEY RANCH, TOWN OF has 51 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, TT, Other. 7 are health-based violations.
How many people does STAR VALLEY RANCH, TOWN OF serve?
STAR VALLEY RANCH, TOWN OF serves approximately 2,030 people, Wyoming. The system provides water to 2 communities: Thayne, Star Valley Ranch.
What type of water does STAR VALLEY RANCH, TOWN OF provide?
STAR VALLEY RANCH, TOWN OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WY5600287.
How does STAR VALLEY RANCH, TOWN OF compare to other utilities in Wyoming?
STAR VALLEY RANCH, TOWN OF scores 18/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Wyoming state page for a full comparison of water systems.