A87/100
Mt Vernon Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 5,483 residents · Illinois
What's In Mt Vernon's Tap Water?
51
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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
NORTHEAST MOUNT VERNON WATER COMPANY
Population Served
5,483
Water Source
Purchased Surface Water
System ID
IL0810010
Frequently Asked Questions About Mt Vernon Water
Is Mt Vernon tap water safe to drink?
Mt Vernon, Illinois tap water receives a grade of A (87/100), which is considered excellent. Out of 51 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Mt Vernon's water?
51 contaminants were tested in Mt Vernon's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Mt Vernon have any water quality violations?
Yes, Mt Vernon has 9 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Mt Vernon?
Mt Vernon 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 Mt Vernon's tap water come from?
Mt Vernon's drinking water is sourced from purchased surface water and supplied by NORTHEAST MOUNT VERNON WATER COMPANY. The system serves approximately 5,483 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Mt Vernon'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. Mt Vernon'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 Mt Vernon's water compare to other cities in Illinois?
Mt Vernon's water quality score of 87/100 earns a grade of A, which is considered excellent. This places Mt Vernon among the better-performing water systems in Illinois. Visit our Illinois state page to see how all cities in the state compare.
What should I do if I'm concerned about Mt Vernon's water quality?
If you have concerns about Mt Vernon'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 (NORTHEAST MOUNT VERNON WATER COMPANY) 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.