B74/100
Troy Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 16,962 residents · Illinois
What's In Troy's Tap Water?
67
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.69 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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
TROY
Population Served
16,962
Water Source
Groundwater
System ID
IL1191000
Frequently Asked Questions About Troy Water
Is Troy tap water safe to drink?
Troy, Illinois tap water receives a grade of B (74/100), which is considered good. Out of 67 contaminants tested, 1 exceed EPA maximum contaminant levels (MCLs) and 1 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 Troy's water?
Of the 67 contaminants tested in Troy's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Troy have any water quality violations?
Yes, Troy has 6 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, MCL, TT. 3 of these are health-based violations, which are the most serious category.
Do I need a water filter in Troy?
Based on EPA data, using a water filter in Troy 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 Troy's tap water come from?
Troy's drinking water is sourced from groundwater and supplied by TROY. The system serves approximately 16,962 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Troy'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. Troy'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 Troy's water compare to other cities in Illinois?
Troy's water quality score of 74/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Illinois state page to see how all cities in the state compare.
What should I do if I'm concerned about Troy's water quality?
If you have concerns about Troy'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 (TROY) 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.