Is Lenzburg, IL Tap Water Safe to Drink?
Graded B — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
77.9/100
waterverge.com Lenzburg, IL — Water Quality Report
Lenzburg's drinking water received a grade of B (77.9 out of 100), indicating good water quality. The city's 1 water system serves approximately 680 residents using purchased surface water.
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 13 violations on record, including 3 health-based violations. 8 remain unresolved.
What to know about Lenzburg's water
Lenzburg ranks #618 out of 891 cities in Illinois for water quality, placing it below 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.
As a small community water system, Lenzburg may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Lenzburg, IL water safe to drink?
Lenzburg's drinking water has significant quality concerns based on EPA testing data. With a grade of B (77.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 680 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Lenzburg
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Lenzburg's water quality assessment. Grade: B (77.9/100).
Contaminants: Lead and Copper Rule.
Contaminants: Total Haloacetic Acids (HAA5).
Contaminants: Lead and Copper Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Lenzburg's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Lenzburg's water system has 13 total violations on record, including 3 health-based violations. 8 remain unresolved. 2 violations were issued in the last 5 years.
Where does Lenzburg's water come from?
Lenzburg's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 680 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Silver Creek (river).
What Lenzburg residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Lenzburg'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 Lenzburg
Industrial polluters nearby
Reported releases to surface water by facilities near Lenzburg, ranked by pounds discharged annually.
Total reported releases to surface water: 1,700 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
PRAIRIE STATE GENERATING CO MARISSA, IL62257 | Ammonia | 1,307 | 8.1 mi |
BALDWIN ENERGY COMPLEX BALDWIN, IL62217 | Ammonia | 393 | 5.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Recommended water filters
Based on contaminants detected in Lenzburg'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. | 0.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.02 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 2.020 mg/L (1994)
EPA action level: 1.3 mg/L
See how Lenzburg compares by contaminant
Explore where Lenzburg ranks among all Illinois cities for specific contaminants.
Water source & infrastructure
Where Lenzburg's water comes from
Lenzburg'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 680 people through 1 water system.
Water bodies near Lenzburg
Lenzburg is located near 1 notable water body. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Lenzburg
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LENZBURG | IL1630700 | 680 | SWP |
How Lenzburg compares
Full Illinois rankings →Lenzburg's score of 77.9/100 is above the average of 56/100 among major Illinois cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Illinois rankings →About Lenzburg, 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 Lenzburg's water quality findings.
Explore water quality across St. Clair
Frequently asked questions
Is Lenzburg, IL tap water safe to drink?
Lenzburg's water quality earned a grade of B (77.9/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #618 out of 891 cities tested in Illinois.
What contaminants are in Lenzburg's water?
Lead was measured at 0.0 ppb (90th percentile). 13 violations are on record.
How is Lenzburg'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 Lenzburg?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lenzburg's water come from?
Lenzburg's water is sourced from Purchased surface water. The city has 1 water system serving approximately 680 residents.
What health violations has Lenzburg's water system had?
Lenzburg has 3 health-based violations on record. The most recent violation was recorded in October 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 8 violations remain unresolved.
How does Lenzburg's water compare to other cities?
Lenzburg ranks #618 out of 891 cities in Illinois (better than 31% of state cities) and #8865 out of 15744 cities nationally (44th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lenzburg's small water system affect quality?
Lenzburg's system serves approximately 680 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 13 violations on record.