A89/100
Stillman Valley Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,200 residents · Illinois
What's In Stillman Valley's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2003.
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
STILLMAN VALLEY
Population Served
1,200
Water Source
Groundwater
System ID
IL1410550
Frequently Asked Questions About Stillman Valley Water
Is Stillman Valley tap water safe to drink?
Stillman Valley, Illinois tap water receives a grade of A (89/100), which is considered excellent. Out of 1 contaminants tested, none 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 Stillman Valley's water?
Of the 1 contaminants tested in Stillman Valley's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Stillman Valley have any water quality violations?
Yes, Stillman Valley has 8 EPA violation(s) on record, with the most recent in 2003. Violation types include MR. None of these are classified as health-based violations.
Do I need a water filter in Stillman Valley?
Stillman Valley 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. 1 contaminant(s) exceed these stricter goals.
Where does Stillman Valley's tap water come from?
Stillman Valley's drinking water is sourced from groundwater and supplied by STILLMAN VALLEY. The system serves approximately 1,200 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Stillman Valley'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. Stillman Valley'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 Stillman Valley's water compare to other cities in Illinois?
Stillman Valley's water quality score of 89/100 earns a grade of A, which is considered excellent. This places Stillman Valley 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 Stillman Valley's water quality?
If you have concerns about Stillman Valley'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 (STILLMAN VALLEY) 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.