Corunna, MI Water Safety: 75/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Tap water in Corunna, MI scores well — low violation counts, above-average safety grade.
How Corunna Compares
Data: EPA SDWIS Last verified: 2026-06-03
Corunna Water: The Quick Version
- Homes built before 1986: 80% — older plumbing may contain lead solder.
- Estimated remediation: $1,600 per household.
- CDC health risk index: 14.53 — above typical levels.
Water Systems Serving Corunna
Residential addresses in Corunna, MI are served by 2 primary water providers out of 2 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 1 ZIP code in Corunna, Michigan (population ~5,451), covering 2 community water systems serving approximately 18,381 people region-wide.
No EPA violations recorded across any ZIP codes in Corunna — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Corunna: B (75/100)
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
Corunna water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Corunna
- 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 |
|---|---|---|---|
| 48817 | B | City of Corunna, | 2,028 |
All ZIP Codes in Corunna
- 48817 [B]
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 Corunna
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 Corunna's Housing Stock?
With 80% 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
Viewed through the lens of construction era, Corunna is predominantly an older city — a median build year of 1961 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Corunna 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.
Corunna: Remediation Cost in Perspective
How much of a Corunna home's value does documented remediation represent? A small fraction — the equity share here is in the low tier, and from a household financial perspective, most property owners are considering a commitment that fits comfortably within standard planning rather than a decision that rises to the level of a material budget event or significant equity consideration.
Remediation costs in Corunna are relatively low compared to home values. The $800–$2,600 estimated range is a small fraction of median property value. Home values are 20% below the Michigan average.
Protecting Children from Lead in Corunna
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 80% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Corunna.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Corunna
Flood exposure in Corunna is meaningful by NFIP measures — 7 claims on record and 100% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Corunna has a moderate flood history with 7 FEMA claims averaging $1,356 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>$1,600</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.
Deep Dive Reports
Detailed analysis for Corunna, MI