CITY REPORT WI

Sister Bay, WI Water - Home Safety Score unavailable

1 ZIP code · 1 water system · Updated

Data: EPA SDWIS

1
ZIP Codes
1
Water Systems
0
ZIPs with Violations
Zone 1
Radon Risk (High)
$420K
Median Home Value
$3,000
Est. Remediation (0.7% of home value)

Key Facts for Sister Bay Residents

  • Average lead level: 0.0061 mg/L.
  • Homes built before 1986: 48% - older plumbing may contain lead solder.
  • Estimated remediation: $3,000 per household.
  • CDC health risk index: 14.01 - above typical levels.

Sister Bay's Water Providers

Consolidated water delivery characterizes Sister Bay, WI: among 1 system in federal records, one utility holds the dominant service position - carrying the rate-setting authority, the infrastructure obligations, and the EPA reporting burden for most residential addresses.

Overview

We track home safety data for 1 ZIP code in Sister Bay, Wisconsin, covering 1 community water system serving approximately 2,130 people. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.

Water Sources

Sister Bay water systems draw from: Groundwater.

Lead & Copper

  • Average lead level (90th percentile): 0.0061 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status 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
54234 Sister Bay Waterworks 1,000

All ZIP Codes in Sister Bay

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Sister Bay Community Health Snapshot

10.5%
Asthma (US: 9.8%)
13%
Diabetes (US: 10.4%)
13%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.

Compared to National Average

Asthma 10.5% ↑
Diabetes 13% ↑
Mental Health 13% ↓

Vertical line = national average. Above national · Below national

Sister Bay Infrastructure Age

1982
Median Build Year
48%
Built Before 1986
19%
Built Before 1970
Copper
Likely Pipe Material

With 48% 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

For a city with a median build year of 1982, Sister Bay carries a housing profile that straddles the 1986 federal ban on lead solder in plumbing. Neither predominantly new nor predominantly old, the stock presents a moderate aggregate risk environment - with individual risk varying sharply depending on when and where a specific home was built.

1982
Median Year Built
48%
Pre-1986 (Lead Paint Risk)
19%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (19%) 1970–1986 (29%) Post-1986 (52%)

Most homes in Sister Bay were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

How Remediation Costs Compare in Sister Bay

When estimated remediation is placed alongside median property values in Sister Bay, the resulting ratio is low - a finding consistent with a household financial perspective where documented issues can be addressed without a meaningful impact on overall equity position, making this market one of the more favorable contexts for remediation planning.

Median Home Value
$419,600
Est. Remediation
$3,000
Remediation as % of home value 0.7%

Remediation costs in Sister Bay are relatively low compared to home values. The $2,000–$4,000 estimated range is a small fraction of median property value. Home values are 82% above the Wisconsin average.

Sister Bay: Lead Risk & Vulnerable Populations

48%
Homes Built Before 1986
0.0061
mg/L Avg Lead (Limit: 0.015)

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.

Reading the local data together points toward a structural gap that matters more here than in low-exposure communities. 48% of Sister Bay stock comes from the pre-rule era, and citywide monitoring either approaches or sits beyond the federal benchmark under Lead and Copper Rule sampling. A baseline kit fits the routine-diligence category, with certified filtration available via retailer networks where confirmed faucet results warrant additional measures.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Sister Bay: NFIP Claim Records and Water-Quality Context

1
Total FEMA Flood Claims
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Sister Bay contains 1 flood insurance claim. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

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. The <strong>$3,000</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

Frequently Asked Questions

Does Sister Bay water have lead?
The average 90th-percentile lead level in Sister Bay is 0.0061 mg/L. This is below the EPA action level of 0.015 mg/L. Lead levels can vary by home - testing is recommended especially in older properties.
How many water systems serve Sister Bay?
Sister Bay is served by 1 public water system across 1 ZIP code, serving approximately 2,130 people.
How much does it cost to fix water issues in Sister Bay?
Estimated remediation costs in Sister Bay average $3,000 per household, ranging from $2,000 to $4,000. Costs include filtration, pipe replacement, radon mitigation, and flood protection.
HomeCitiesWisconsin → Sister Bay, WI

How to cite this page

APA ZipCheckup. (2026). Sister Bay, WI Water - Home Safety Score unavailable. https://zipcheckup.com/cities/wi/sister-bay/
BibTeX
@misc{zipcheckup-cities-wi-sister-bay,
  author = {{ZipCheckup}},
  title  = {{Sister Bay, WI Water - Home Safety Score unavailable}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/wi/sister-bay/}
}

Page version: August 2026.

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