Is Granville, IL Tap Water Safe to Drink?
Graded B+, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
83.3/100
waterverge.com Granville, IL — Water Quality Report
Granville's drinking water received a grade of B+ (83.3 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,359 residents using groundwater.
Lead levels were measured at 7.7 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 70 violations on record, including 27 health-based violations. 3 remain unresolved.
What to know about Granville's water
Granville ranks #450 out of 891 cities in Illinois for water quality, placing it below average in the state.
Granville 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.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
As a small community water system, Granville may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Granville, IL water safe to drink?
Granville's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (83.3/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,359 residents using groundwater (wells).
Recent water quality updates for Granville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Granville's water quality assessment. Grade: B+ (83.3/100).
Contaminants: BHC-GAMMA, Diquat, Endothall.
Federal disaster declaration (FEMA DR-4116). Flood event — may have impacted local water infrastructure.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
Federal disaster declaration (FEMA DR-3230). Hurricane event — may have impacted local water infrastructure.
2 health-based. Contaminants: Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228).
Key contaminant findings
Based on the most recent EPA sampling data for Granville's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Violation history
Granville's water system has 70 total violations on record, including 27 health-based violations. 3 remain unresolved.
Flood & environmental risk
Putnam County has experienced 3 federally declared disasters since 1979. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Granville's water come from?
Granville's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,359 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Granville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Granville'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Granville'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 Granville
Industrial polluters nearby
Reported releases to surface water by facilities near Granville, ranked by pounds discharged annually.
Total reported releases to surface water: 1,020 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
CARUS LLC LASALLE SITE LA SALLE, IL61301 | Barium | 997 | 8.9 mi |
ILLINOIS CEMENT CO LA SALLE, IL61301 | Manganese | 16 | 8.9 mi |
AMERICAN NICKELOID CO PERU, IL61354 | Nickel And Nickel Compounds | 6 | 6.0 mi |
W. H. MAZE CO -NAIL DIV PERU, IL61354 | Zinc compounds | 0 | 6.1 mi |
EPSILYTE LLC PERU, IL61354 | Styrene | 0 | 7.5 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Granville
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.
- DEPUE NEW JERSEY ZINC MOBIL CHEMICAL CORP5.7 mi
- LASALLE ELECTRIC UTILITIES9.2 mi
- MATTHIESSEN AND HEGELER ZINC COMPANY9.3 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Putnam County has experienced 3 federally declared disasters since 1979. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Granville's water supply, we recommend the following filter types.
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. | 7.7 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Granville compares by contaminant
Explore where Granville ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where Granville's water comes from
Granville'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 local government ownership and serves approximately 1,359 people through 1 water system.
Water systems serving Granville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| GRANVILLE | IL1550050 | 1,359 | GW |
How Granville compares
Full Illinois rankings →Granville's score of 83.3/100 is above the average of 56/100 among major Illinois cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Illinois rankings →About Granville, IL
Learn more about your water
Guides and resources related to Granville's water quality findings.
Explore water quality across Putnam
Frequently asked questions
Is Granville, IL tap water safe to drink?
Granville's water quality earned a grade of B+ (83.3/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #450 out of 891 cities tested in Illinois.
What contaminants are in Granville's water?
Lead was measured at 7.7 ppb (90th percentile). 70 violations are on record.
How is Granville'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 Granville?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Granville's water come from?
Granville's water is sourced from Groundwater. The city has 1 water system serving approximately 1,359 residents.
What health violations has Granville's water system had?
Granville has 27 health-based violations on record. The most recent violation was recorded in January 2020. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
Is Granville's groundwater at risk of contamination?
Granville 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 70 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 Granville's water compare to other cities?
Granville ranks #450 out of 891 cities in Illinois (better than 49% of state cities) and #6500 out of 15744 cities nationally (59th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Granville's small water system affect quality?
Granville's system serves approximately 1,359 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 70 violations on record.