Is Sleepy Hollow, IL Tap Water Safe to Drink?
Graded A-, with 4 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
89.9/100
waterverge.com Sleepy Hollow, IL — Water Quality Report
Sleepy Hollow's drinking water received a grade of A- (89.9 out of 100), indicating good water quality. The city's 1 water system serves approximately 3,100 residents using purchased surface water.
Lead levels were measured at 1.8 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 16 violations on record, including 4 health-based violations. 4 remain unresolved.
What to know about Sleepy Hollow's water
Sleepy Hollow ranks #157 out of 891 cities in Illinois for water quality, placing it above average in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
Hexavalent chromium (chromium-6) was detected at 0.51 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
As a small community water system, Sleepy Hollow may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Sleepy Hollow, IL water safe to drink?
Sleepy Hollow's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (89.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 3,100 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Sleepy Hollow
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Sleepy Hollow's water quality assessment. Grade: A- (89.9/100).
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-4116). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3230). Hurricane event — may have impacted local water infrastructure.
1 health-based. Contaminants: Coliform (TCR).
1 health-based. Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Sleepy Hollow's water supply.
Well within EPA limits.
Violation history
Sleepy Hollow's water system has 16 total violations on record, including 4 health-based violations. 4 remain unresolved.
Flood & environmental risk
Kane County has experienced 5 federally declared disasters since 1973. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Flint Creek, Fox River, Fox River (Tailwater), Tyler Creek, Poplar Creek.
Where does Sleepy Hollow's water come from?
Sleepy Hollow's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 3,100 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Flint Creek (river), Fox River (river), Fox River (Tailwater) (river), Tyler Creek (river), Poplar Creek (river).
What Sleepy Hollow residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Sleepy Hollow'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.
Sleepy Hollow's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
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 Sleepy Hollow
Industrial polluters nearby
Reported releases to surface water by facilities near Sleepy Hollow, ranked by pounds discharged annually.
Total reported releases to surface water: 0 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
OLDCASTLE PRECAST INC ELGIN, IL60120 | Lead compounds | 0 | 6.8 mi |
AMPAC FLEXIBLES LLC (PREVIOUSLY FLEXICON INC) CARY, IL60013 | — | — | 8.8 mi |
TRUE VALUE MANUFACTURING CARY, IL60013 | — | — | 8.9 mi |
DUREX INDUSTRIES CARY, IL60013 | — | — | 8.6 mi |
GROVE PLATING CO INC. FOX RIVER GROVE, IL60021 | — | — | 8.9 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Sleepy Hollow
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- TRI COUNTY LANDFILL CO WASTE MANAGEMENT OF ILLINOIS INC7.7 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Kane County has experienced 5 federally declared disasters since 1973. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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. | 1.8 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Sleepy Hollow compares by contaminant
Explore where Sleepy Hollow ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where Sleepy Hollow's water comes from
Sleepy Hollow's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 3,100 people through 1 water system.
Water bodies near Sleepy Hollow
Sleepy Hollow is located near 5 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Sleepy Hollow
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SLEEPY HOLLOW | IL0890750 | 3,100 | SWP |
How Sleepy Hollow compares
Full Illinois rankings →Sleepy Hollow's score of 89.9/100 is above the average of 56/100 among major Illinois cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Illinois rankings →About Sleepy Hollow, IL
Wikipedia →Sleepy Hollow is a village in Kane County, Illinois, United States. The population was 3,214 at the 2020 census.
Learn more about your water
Guides and resources related to Sleepy Hollow's water quality findings.
Explore water quality across Kane
Frequently asked questions
Is Sleepy Hollow, IL tap water safe to drink?
Sleepy Hollow's water quality earned a grade of A- (89.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #157 out of 891 cities tested in Illinois.
What contaminants are in Sleepy Hollow's water?
Lead was measured at 1.8 ppb (90th percentile). 16 violations are on record.
How is Sleepy Hollow'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 Sleepy Hollow?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Sleepy Hollow's water come from?
Sleepy Hollow's water is sourced from Purchased surface water. The city has 1 water system serving approximately 3,100 residents.
What health violations has Sleepy Hollow's water system had?
Sleepy Hollow has 4 health-based violations on record. The most recent violation was recorded in July 2019. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 4 violations remain unresolved.
How does Sleepy Hollow's water compare to other cities?
Sleepy Hollow ranks #157 out of 891 cities in Illinois (better than 82% of state cities) and #2503 out of 15744 cities nationally (84th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Sleepy Hollow's small water system affect quality?
Sleepy Hollow's system serves approximately 3,100 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 16 violations on record.