Greenwood, WI Water Safety: 83/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Within Greenwood, safety indicators for tap water remain above the WI median — documented violations are infrequent and the city's compliance record sits in the upper tier.
How Greenwood Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Greenwood Residents
- Average lead level: 0.0022 mg/L.
- Homes built before 1986: 74% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
- CDC health risk index: 14.19 — above typical levels.
Greenwood's Water Providers
One utility dominates residential water service in Greenwood, WI — out of 1 system in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Greenwood, Wisconsin, covering 1 community water system serving approximately 3,173 people.
No EPA violations recorded across any ZIP codes in Greenwood — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Greenwood: B (83/100)
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
Greenwood water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0022 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.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 54437 | B | Greenwood Waterworks | 1,079 |
All ZIP Codes in Greenwood
- 54437 [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.
Greenwood 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
Greenwood Infrastructure Age
With 74% 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 lead that enters tap water in older homes often comes not from the municipal supply but from the home's own plumbing — from solder used in copper joints before the 1986 federal ban, or from lead pipes installed before 1970. In Greenwood, where the median build year is 1963, these older materials are widespread. More than half the residential stock predates the 1986 solder ban, and a significant fraction predates 1970 as well. For residents in those homes, the city-wide water quality picture is a less relevant frame than the specific materials inside their own walls and under their own street.
Over half of homes in Greenwood 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 Greenwood
Placing remediation in the context of Greenwood's property market, the equity share is low — most homeowners here are weighing a financial commitment that fits comfortably within routine property planning, far from the threshold where remediation becomes a material equity decision rather than a standard upkeep consideration.
Remediation costs in Greenwood are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 36% below the Wisconsin average.
Greenwood: 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.
Locally, 74% of Greenwood homes carry interior plumbing from the era when lead solder was still permitted in new builds, and citywide monitoring approaches or crosses the EPA action benchmark. Households can find a draw-test kit and certified filtration through verified retailers.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Greenwood, WI