B71/100
Round Lake Beach Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 27,200 residents · Illinois
What's In Round Lake Beach's Tap Water?
70
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.39 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 10, 2023 – May 6, 2024Enforcement: 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
ROUND LAKE BEACH
Population Served
27,200
Water Source
Purchased Surface Water
System ID
IL0971550
Frequently Asked Questions About Round Lake Beach Water
Is Round Lake Beach tap water safe to drink?
Round Lake Beach, Illinois tap water receives a grade of B (71/100), which is considered good. Out of 70 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 Round Lake Beach's water?
Of the 70 contaminants tested in Round Lake Beach'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 Round Lake Beach have any water quality violations?
Yes, Round Lake Beach has 9 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR, MCL. 3 of these are health-based violations, which are the most serious category.
Do I need a water filter in Round Lake Beach?
Based on EPA data, using a water filter in Round Lake Beach 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 Round Lake Beach's tap water come from?
Round Lake Beach's drinking water is sourced from purchased surface water and supplied by ROUND LAKE BEACH. The system serves approximately 27,200 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Round Lake Beach'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. Round Lake Beach'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 Round Lake Beach's water compare to other cities in Illinois?
Round Lake Beach's water quality score of 71/100 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 Round Lake Beach's water quality?
If you have concerns about Round Lake Beach'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 (ROUND LAKE BEACH) 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.