Unlike many cities its size in SD, Winner keeps health-based violation rates low — systems here score at or above the state average for tap water safety, with no systemic concerns flagged in the current data set.

Data: EPA SDWIS Last verified: 2026-06-03

Overview

We track water quality and home safety data for 1 ZIP code in Winner, South Dakota (population ~4,271), covering 2 community water systems serving approximately 7,781 people region-wide.

No EPA violations recorded across any ZIP codes in Winner — an excellent indicator of water quality.

Home Safety Score

Average Home Safety Score for Winner: 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

Winner water systems draw from: Groundwater.

Lead & Copper

• Average lead level (90th percentile): 0.0020 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

All ZIP Codes in Winner

• 57580 [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.

Housing Age Profile

Federal plumbing rules changed in two stages — lead pipes were phased out before 1970, and lead solder was banned in 1986 — but in Winner, where the median build year is 1963, most of the housing was already in place before those rules took effect. The materials installed under older standards remain embedded in a substantial portion of the residential inventory today.

1963

Median Year Built

77%

Pre-1986 (Lead Paint Risk)

43%

Pre-1970 (Lead Pipes Risk)

Pre-1970 (43%) 1970–1986 (34%) Post-1986 (23%)

Over half of homes in Winner 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.

Winner: Remediation Cost in Perspective

In Winner, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.

Median Home Value

$141,000

Est. Remediation

$400

Remediation as % of home value 0.3%

Remediation costs in Winner are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 19% below the South Dakota average.

Protecting Children from Lead in Winner

77%

Homes Built Before 1986

0.002

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. 77% of Winner 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.