Is Rosiclare, IL Tap Water Safe to Drink?
Graded A with no contaminants above EPA limits. Here's everything we tested and how Rosiclare ranks. What to do next ↓
93.1/100
waterverge.com Rosiclare, IL — Water Quality Report
Rosiclare's drinking water received a grade of A (93.1 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 1,387 residents using ground water under influence.
Lead levels were measured at 1.0 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 1 violation on record, including 1 health-based violation. All violations have been resolved.
What to know about Rosiclare's water
Rosiclare ranks #51 out of 891 cities in Illinois for water quality, placing it one of the best in the state.
Rosiclare 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, Rosiclare may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Rosiclare, IL water safe to drink?
Based on EPA testing data, Rosiclare's tap water is generally safe to drink. The water system earned a grade of A (93.1/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 1,387 residents using groundwater (wells).
Recent water quality updates for Rosiclare
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Rosiclare's water quality assessment. Grade: A (93.1/100).
1 health-based. Contaminants: Interim Enhanced Surface Water Treatment Rule.
Federal disaster declaration (FEMA DR-4461). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3230). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Rosiclare's water supply.
Well within EPA limits.
Violation history
Rosiclare's water system has 1 total violation on record, including 1 health-based violation. All violations have been resolved. 1 violation was issued in the last 5 years.
Flood & environmental risk
Madison County has experienced 6 federally declared disasters since 1969. 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 Mississippi River Pool Lock And Dam 26 At Alton,Il, Mill Creek Near Florissant, Coldwater Creek Near Black Jack.
Where does Rosiclare's water come from?
Rosiclare's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,387 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Mississippi River Pool Lock And Dam 26 At Alton,Il (river), Mill Creek Near Florissant (river), Coldwater Creek Near Black Jack (river).
What Rosiclare residents can do
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.
Rosiclare'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
Drought conditions
D1 — moderate droughtHardin County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Madison County has experienced 6 federally declared disasters since 1969. 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. | 1.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Rosiclare compares by contaminant
Explore where Rosiclare ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where Rosiclare's water comes from
Rosiclare'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 private ownership and serves approximately 1,387 people through 1 water system.
Water bodies near Rosiclare
Rosiclare is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Rosiclare
| System Name | PWSID | Population | Source |
|---|---|---|---|
| IL AMERICAN-ROSICLARE | IL0690160 | 1,387 | GU |
How Rosiclare compares
Full Illinois rankings →Rosiclare's score of 93.1/100 is above the average of 56/100 among major Illinois cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Illinois rankings →About Rosiclare, IL
Wikipedia →Godfrey is a village in Madison County, Illinois, United States. The population was 17,825 at the 2020 census. Godfrey is located within the River Bend portion of the Greater St. Louis metropolitan area.
Learn more about your water
Guides and resources related to Rosiclare's water quality findings.
Explore water quality across Hardin
Frequently asked questions
Is Rosiclare, IL tap water safe to drink?
Rosiclare's water quality earned a grade of A (93.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #51 out of 891 cities tested in Illinois.
What contaminants are in Rosiclare's water?
Lead was measured at 1.0 ppb (90th percentile). 1 violation is on record.
How is Rosiclare'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 Rosiclare?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Rosiclare's water come from?
Rosiclare's water is sourced from Ground water under influence. The city has 1 water system serving approximately 1,387 residents.
What health violations has Rosiclare's water system had?
Rosiclare has 1 health-based violation on record. The most recent violation was recorded in February 2021. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. All health violations have been resolved.
Is Rosiclare's groundwater at risk of contamination?
Rosiclare 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 1 violation 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 Rosiclare's water compare to other cities?
Rosiclare ranks #51 out of 891 cities in Illinois (better than 94% of state cities) and #970 out of 15744 cities nationally (94th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Rosiclare's small water system affect quality?
Rosiclare's system serves approximately 1,387 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 1 violation on record.