B79/100
Gillette Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 35,902 residents · Wyoming
What's In Gillette's Tap Water?
66
Contaminants Tested
0
Exceed EPA Limits
2
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
strontium | 2000.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
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: October 1, 2023 – December 31, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 1, 2023 – June 30, 2023Rule: Total Coliform 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
Water Utility Details
GILLETTE, CITY OF
Population Served
32,222
Water Source
Groundwater
System ID
WY5600019
ANTELOPE VALLEY I&S DISTRICT (AVISD)
Population Served
1,280
Water Source
Groundwater
System ID
WY5600251
SLEEPY HOLLOW SUBDIVISION
Population Served
2,400
Water Source
Groundwater
System ID
WY5600764
Frequently Asked Questions About Gillette Water
Is Gillette tap water safe to drink?
Gillette, Wyoming tap water receives a grade of B (79/100), which is considered good. Out of 66 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 2 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Gillette's water?
Of the 66 contaminants tested in Gillette's water supply, the most notable include Lead (90th percentile), strontium. No contaminants exceed EPA legal limits. 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Gillette have any water quality violations?
Yes, Gillette has 31 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, MON, MCL. 5 of these are health-based violations, which are the most serious category.
Do I need a water filter in Gillette?
Gillette water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 2 contaminant(s) exceed these stricter goals.
Where does Gillette's tap water come from?
Gillette's drinking water is sourced from groundwater and supplied by GILLETTE, CITY OF and 2 other water system(s). The system serves approximately 35,902 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Gillette's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Gillette's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Gillette's water compare to other cities in Wyoming?
Gillette's water quality score of 79/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Wyoming state page to see how all cities in the state compare.
What should I do if I'm concerned about Gillette's water quality?
If you have concerns about Gillette's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (GILLETTE, CITY OF) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.