Is St Libory, 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 ↓
91.8/100
waterverge.com St Libory, IL — Water Quality Report
St Libory's drinking water received a grade of A (91.8 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 628 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 20 violations on record, including 0 health-based violations. 4 remain unresolved.
What to know about St Libory's water
St Libory ranks #91 out of 891 cities in Illinois for water quality, placing it above average in the state.
St Libory 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, St Libory may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is St Libory, IL water safe to drink?
St Libory's drinking water has significant quality concerns based on EPA testing data. With a grade of A (91.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 628 residents using groundwater (wells).
Recent water quality updates for St Libory
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into St Libory's water quality assessment. Grade: A (91.8/100).
Contaminants: Lead and Copper Rule.
Contaminants: Lead and Copper Rule.
Contaminants: Consumer Confidence Rule.
Key contaminant findings
Based on the most recent EPA sampling data for St Libory's water supply.
Well within EPA limits.
Violation history
St Libory's water system has 20 total violations on record, including 0 health-based violations. 4 remain unresolved. 2 violations were issued in the last 5 years.
Where does St Libory's water come from?
St Libory's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 628 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Silver Creek (river).
What St Libory residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in St Libory'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
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 St Libory compares by contaminant
Explore where St Libory ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where St Libory's water comes from
St Libory'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 628 people through 1 water system.
Water bodies near St Libory
St Libory is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving St Libory
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ST LIBORY | IL1631200 | 628 | GW |
How St Libory compares
Full Illinois rankings →St Libory's score of 91.8/100 is above the average of 56/100 among major Illinois cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Illinois rankings →About St Libory, IL
Wikipedia →Swansea is a village in St. Clair County, Illinois. It is a part of the St. Louis metropolitan area and Metro East in southern Illinois. It is surrounded by the communities of Fairview Heights, Belleville, O’Fallon, and Shiloh. As of the 2020 census, Swansea had a population of 14,386.
Learn more about your water
Guides and resources related to St Libory's water quality findings.
Explore water quality across St. Clair
Frequently asked questions
Is St Libory, IL tap water safe to drink?
St Libory's water quality earned a grade of A (91.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #91 out of 891 cities tested in Illinois.
What contaminants are in St Libory's water?
Lead was measured at 0.0 ppb (90th percentile). 20 violations are on record.
How is St Libory'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 St Libory?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does St Libory's water come from?
St Libory's water is sourced from Groundwater. The city has 1 water system serving approximately 628 residents.
Is St Libory's groundwater at risk of contamination?
St Libory 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 20 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 St Libory's water compare to other cities?
St Libory ranks #91 out of 891 cities in Illinois (better than 90% of state cities) and #1507 out of 15744 cities nationally (90th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does St Libory's small water system affect quality?
St Libory's system serves approximately 628 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 20 violations on record.