A91/100
Palos Park Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 7,673 residents · Illinois
What's In Palos Park's Tap Water?
34
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1995.
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
SOUTH PALOS TWSP SANITARY DIST
Population Served
2,800
Water Source
Purchased Surface Water
System ID
IL0310140
PALOS PARK
Population Served
4,873
Water Source
Purchased Surface Water
System ID
IL0311000
Frequently Asked Questions About Palos Park Water
Is Palos Park tap water safe to drink?
Palos Park, Illinois tap water receives a grade of A (91/100), which is considered excellent. Out of 34 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 Palos Park's water?
34 contaminants were tested in Palos Park's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Palos Park have any water quality violations?
Yes, Palos Park has 13 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, RPT, TT. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Palos Park?
Palos Park 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 Palos Park's tap water come from?
Palos Park's drinking water is sourced from purchased surface water and supplied by SOUTH PALOS TWSP SANITARY DIST and 1 other water system(s). The system serves approximately 7,673 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Palos Park'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. Palos Park'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 Palos Park's water compare to other cities in Illinois?
Palos Park's water quality score of 91/100 earns a grade of A, which is considered excellent. This places Palos Park 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 Palos Park's water quality?
If you have concerns about Palos Park'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 (SOUTH PALOS TWSP SANITARY DIST) 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.