Dupo, IL: 5 Violations — 69/100 (2026)
1 ZIP code · 4 water systems · Updated 2026-06-03
Dupo water quality is uneven — some service areas show clean compliance; others carry documented violations in IL EPA records.
How Dupo Compares
Data: EPA SDWIS Last verified: 2026-06-03
Dupo Water: The Quick Version
- Your city's water systems recorded 5 violations in the past 5 years.
- Average lead level: 0.0016 mg/L.
- Homes built before 1986: 64% — older plumbing may contain lead solder.
- Estimated remediation: $2,200 per household.
- CDC health risk index: 13.66 — above typical levels.
Water Systems Serving Dupo
Dupo, IL is covered by 3 major water utilities out of 4 federally tracked systems, each managing its own pipes, treatment processes, and EPA filings. What a household gets from the tap depends on which provider's system serves that address.
Overview
We track water quality and home safety data for 1 ZIP code in Dupo, Illinois (population ~4,381), covering 4 community water systems serving approximately 147,431 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Dupo: C (69/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Dupo water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0016 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 4 | 1 |
| Lead and Copper Rule | Treatment Technique | 4 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 62239 | C | 5 | 0 | Dupo |
All ZIP Codes in Dupo
- 62239 [C] — 5 violations
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Dupo
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Dupo
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Dupo's Housing Stock?
With 64% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Because the majority of Dupo's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1962 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Dupo were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Dupo: Remediation Cost in Perspective
The equity-to-remediation ratio in Dupo is moderate — worth planning for but within reach for most property owners.
Remediation costs are moderate relative to home values in Dupo. The estimated $1,200–$3,400 range is manageable for most homeowners but still worth budgeting for. Home values are 39% below the Illinois average.
Protecting Children from Lead in Dupo
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
After the federal action removing lead-bearing solder from new plumbing took effect, building practice shifted — but 64% of the Dupo inventory predates that line. With aggregate samples near or beyond 0.015 mg/L, an in-home check moves out of the optional column into the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Dupo
The National Flood Insurance Program captures decades of claims at the local level, building a record of cumulative community flood exposure. For Dupo, that record documents 172 claims and 100% of ZIP codes inside FEMA-designated flood zones. What makes those numbers relevant to water quality is the set of mechanisms flooding activates: heavy precipitation that floods treatment intake zones can introduce contaminants upstream of normal filtration; well casings in low-lying areas can be infiltrated by floodwaters carrying bacteria, sediment, and chemical residue; and distribution system pressure changes during flooding can create backflow conditions. These effects become more probable as flood frequency and magnitude increase — and the NFIP record indicates both are meaningful factors locally.
Dupo has a moderate flood history with 172 FEMA claims averaging $998 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,200</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Dupo
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Stage 1 DBP Rule can reduce the most common contaminant found in Dupo's water.
- Check your home's plumbing. With 64% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Dupo, IL