C58/100
Nashville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 22,499 residents · Illinois
What's In Nashville's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
2
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 290.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water 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
Water Utility Details
MILLSTONE PWD
Population Served
5,565
Water Source
Groundwater
System ID
IL1515050
EGYPTIAN WATER COMPANY
Population Served
2,330
Water Source
Purchased Surface Water
System ID
IL1570010
NASHVILLE
Population Served
3,230
Water Source
Surface Water
System ID
IL1890300
WASHINGTON COUNTY WATER COMPANY
Population Served
11,374
Water Source
Purchased Surface Water
System ID
IL1895600
Frequently Asked Questions About Nashville Water
Is Nashville tap water safe to drink?
Nashville, Illinois tap water receives a grade of C (58/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 43 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Nashville's water?
Of the 70 contaminants tested in Nashville's water supply, the most notable include Copper (90th percentile), Lead (90th percentile), chlorate. 1 contaminant(s) exceed EPA legal limits (MCLs). 3 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Nashville have any water quality violations?
Yes, Nashville has 43 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MCL, MR. 27 of these are health-based violations, which are the most serious category.
Do I need a water filter in Nashville?
Based on EPA data, using a water filter in Nashville is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Nashville's tap water come from?
Nashville's drinking water is sourced from groundwater and supplied by MILLSTONE PWD and 3 other water system(s). The system serves approximately 22,499 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Nashville'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. Nashville'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 Nashville's water compare to other cities in Illinois?
Nashville's water quality score of 58/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Illinois state page to see how all cities in the state compare.
What should I do if I'm concerned about Nashville's water quality?
If you have concerns about Nashville'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 (MILLSTONE PWD) 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.