D29/100
Ennis Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,400 residents · Montana
What's In Ennis's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – August 12, 2024Rule: Ground Water 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
ENNIS TOWN OF
Population Served
1,400
Water Source
Groundwater
System ID
MT0000208
Frequently Asked Questions About Ennis Water
Is Ennis tap water safe to drink?
Ennis, Montana tap water receives a grade of D (29/100), which is considered poor. 0 contaminant(s) exceed EPA maximum contaminant levels and 59 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Ennis's water?
1 contaminants were tested in Ennis's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Ennis have any water quality violations?
Yes, Ennis has 59 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, MCL. 3 of these are health-based violations, which are the most serious category.
Do I need a water filter in Ennis?
Ennis 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. All contaminants are within health goals.
Where does Ennis's tap water come from?
Ennis's drinking water is sourced from groundwater and supplied by ENNIS TOWN OF. The system serves approximately 1,400 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Ennis'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. Ennis'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 Ennis's water compare to other cities in Montana?
Ennis's water quality score of 29/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Montana state page to see how all cities in the state compare.
What should I do if I'm concerned about Ennis's water quality?
If you have concerns about Ennis'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 (ENNIS TOWN 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.