Casco, WI Water Safety: 53/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Federal monitoring data for Casco puts the city in WI's lower safety tier — exceedances show up in multiple utility districts, several systems have met thresholds requiring public notification under the Safe Drinking Water Act, and the compliance deficit has persisted across more than one consecutive reporting cycle, with no clear reversal visible in the most recent data available.
How Casco Compares
Data: EPA SDWIS Last verified: 2026-06-03
Casco Water: The Quick Version
- Homes built before 1986: 61% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 13.88 — above typical levels.
Water Systems Serving Casco
Because residential water in Casco, WI flows primarily through a single utility, infrastructure decisions, rate-setting, and EPA compliance are all managed within one organizational structure. Federal records show 1 system active in the area, but one provider dominates the service landscape for most homes and apartments.
Overview
We track water quality and home safety data for 1 ZIP code in Casco, Wisconsin, covering 1 community water system serving approximately 2,281 people.
No EPA violations recorded across any ZIP codes in Casco — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Casco: D (53/100)
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
Casco water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Casco
- 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.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 54205 | D | LUXEMBURG WATERWORKS | 2,737 |
All ZIP Codes in Casco
- 54205 [D]
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 Casco
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
How Old Is Casco's Housing Stock?
With 61% 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 Casco's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1973 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Casco 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.
Casco: Remediation Cost in Perspective
Across Casco, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in Casco are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 2% above the Wisconsin average.
Protecting Children from Lead in Casco
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.
Routinely in Casco, where 61% of housing predates the solder ban and aggregate utility readings hover near the federal threshold, a faucet-level draw functions as a standard household step for families with small kids.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Casco
- 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. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 61% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Casco, WI