Superior, IA: High Radon Risk — 66/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Superior's water quality grade in IA reflects a middle-ground assessment — service areas range from fully compliant to violation-flagged in current EPA records.
How Superior Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Superior Residents
- Average lead level: 0.004 mg/L.
- Homes built before 1986: 91% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 13.9 — above typical levels.
Superior's Water Providers
Water service in Superior, IA is organized around a single utility — one of 1 tracked by regulator, and the one that manages the local distribution network while holding primary responsibility for EPA compliance reporting.
Overview
We track water quality and home safety data for 1 ZIP code in Superior, Iowa, covering 1 community water system serving approximately 132 people.
No EPA violations recorded across any ZIP codes in Superior — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Superior: C (66/100)
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
Superior water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0040 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High 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 |
|---|---|---|---|
| 51363 | C | Superior Water System | 132 |
All ZIP Codes in Superior
- 51363 [C]
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.
Superior Community Health Snapshot
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
Superior Infrastructure Age
With 91% 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
The median home in Superior was built in 1943 — a figure that places most of the city's residential stock in the era when lead solder was still standard in copper plumbing. Homes built before 1986 may have lead-soldered joints; those built before 1970 face the additional possibility of lead pipes in the service line itself.
Over half of homes in Superior 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.
How Remediation Costs Compare in Superior
What does the elevated remediation share mean for Superior homeowners financially? A serious commitment — one that calls for structured planning rather than an ad-hoc response.
At 2.3% of home value, remediation costs in Superior represent a significant financial burden. For homes valued near the median, fixing water and safety issues could cost $1,100–$2,300. Home values here are 55% below the Iowa average.
Superior: Lead Risk & Vulnerable Populations
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.
Despite citywide averages serving as the standard public reference point, those aggregates cannot resolve what is happening at one specific faucet — and where 91% of Superior homes come from before the solder rule or where utility samples sit at or above the action mark, the gap between system data and faucet reality matters more than it does in lower-exposure communities. An in-home draw closes that gap, with certified filtration through retailer networks available where confirmed faucet results warrant additional measures.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Superior
- 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 91% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Superior, IA