Is Sheridan, IL Tap Water Safe to Drink?
Graded A, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
91/100
waterverge.com Sheridan, IL — Water Quality Report
Sheridan's drinking water received a grade of A (91 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,670 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 26 violations on record, including 0 health-based violations. 3 remain unresolved.
What to know about Sheridan's water
Sheridan ranks #116 out of 891 cities in Illinois for water quality, placing it above average in the state.
Sheridan relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Sheridan may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Sheridan, IL water safe to drink?
Sheridan's drinking water has significant quality concerns based on EPA testing data. With a grade of A (91/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,670 residents using groundwater (wells).
Recent water quality updates for Sheridan
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Sheridan's water quality assessment. Grade: A (91/100).
Contaminants: Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Contaminants: Total Haloacetic Acids (HAA5).
Key contaminant findings
Based on the most recent EPA sampling data for Sheridan's water supply.
Well within EPA limits.
Violation history
Sheridan's water system has 26 total violations on record, including 0 health-based violations. 3 remain unresolved. 1 violation was issued in the last 5 years.
Where does Sheridan's water come from?
Sheridan's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,670 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Fox River (river).
What Sheridan residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Sheridan's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Sheridan
Industrial polluters nearby
Reported releases to surface water by facilities near Sheridan, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
DURO CAST INC SOMONAUK, IL60552 | — | — | 7.2 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Sheridan compares by contaminant
Explore where Sheridan ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where Sheridan's water comes from
Sheridan's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by state ownership and serves approximately 1,670 people through 1 water system.
Water bodies near Sheridan
Sheridan is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Sheridan
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SHERIDAN CORRECTIONAL CENTER | IL0995840 | 1,670 | GW |
How Sheridan compares
Full Illinois rankings →Sheridan's score of 91/100 is above the average of 56/100 among major Illinois cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Illinois rankings →About Sheridan, IL
Wikipedia →Sheridan is a village in LaSalle County, Illinois, United States. As of the 2020 census, the village's population was 2,431, up from 2,137 at the 2010 census. It is part of the Ottawa Micropolitan Statistical Area.
Learn more about your water
Guides and resources related to Sheridan's water quality findings.
Explore water quality across Lasalle
Frequently asked questions
Is Sheridan, IL tap water safe to drink?
Sheridan's water quality earned a grade of A (91/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #116 out of 891 cities tested in Illinois.
What contaminants are in Sheridan's water?
Lead was measured at 0.0 ppb (90th percentile). 26 violations are on record.
How is Sheridan's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Sheridan?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Sheridan's water come from?
Sheridan's water is sourced from Groundwater. The city has 1 water system serving approximately 1,670 residents.
Is Sheridan's groundwater at risk of contamination?
Sheridan uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 26 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Sheridan's water compare to other cities?
Sheridan ranks #116 out of 891 cities in Illinois (better than 87% of state cities) and #1943 out of 15744 cities nationally (88th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Sheridan's small water system affect quality?
Sheridan's system serves approximately 1,670 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 26 violations on record.