A89/100
Rosemont Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 3,952 residents · Illinois
What's In Rosemont's Tap Water?
31
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.027 mg/L | 0.015 mg/L | Over Limit |
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
ROSEMONT
Population Served
3,952
Water Source
Purchased Surface Water
System ID
IL0312760
Frequently Asked Questions About Rosemont Water
Is Rosemont tap water safe to drink?
Rosemont, Illinois tap water receives a grade of A (89/100), which is considered excellent. Out of 31 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 Rosemont's water?
Of the 31 contaminants tested in Rosemont's water supply, the most notable include Lead (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 Rosemont have any water quality violations?
Yes, Rosemont has 3 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MR. None of these are classified as health-based violations.
Do I need a water filter in Rosemont?
Based on EPA data, using a water filter in Rosemont 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 Rosemont's tap water come from?
Rosemont's drinking water is sourced from purchased surface water and supplied by ROSEMONT. The system serves approximately 3,952 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Rosemont'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. Rosemont'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 Rosemont's water compare to other cities in Illinois?
Rosemont's water quality score of 89/100 earns a grade of A, which is considered excellent. This places Rosemont 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 Rosemont's water quality?
If you have concerns about Rosemont'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 (ROSEMONT) 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.