Home hazard report for 57186 — Sioux Falls, SD
ZIP 57186 is served by Kohala Ranch Water Co. (as listed by the state): no health-based violations since 2016, latest lead result 10.8 ppb, PFAS not detected. Minnehaha is in EPA radon zone 1.
No health-based violations reported since 2016.
Below the current 15 ppb action level but above 10 ppb, the action level under EPA's Lead and Copper Rule Improvements (compliance from 2027). Latest round: Jan 2019.
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
No active Superfund site within 10 miles of the ZIP center.
Active weather alerts
live from the National Weather ServiceChecking the National Weather Service…
Where ZIP 57186 is
blue: utility service area · scroll or pinch to zoomDrinking water: Kohala Ranch Water Co.
Health-based violations
No health-based violations reported since 2016.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFDA | not detected | 0 of 2 | — |
| PFNA | not detected | 0 of 2 | — |
| PFHxS | not detected | 0 of 2 | — |
| PFHpA | not detected | 0 of 2 | — |
| PFHxA | not detected | 0 of 2 | — |
| PFOA | not detected | 0 of 2 | 4 ppt MCL |
| PFOS | not detected | 0 of 2 | 4 ppt MCL |
| PFBS | not detected | 0 of 2 | — |
| PFPeA | not detected | 0 of 2 | — |
| PFBA | not detected | 0 of 2 | — |
| HFPO-DA (GenX) | not detected | 0 of 2 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
Radon in Minnehaha
EPA radon zone 1 — highest potential. Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Williams Pipe Line Co. Disposal Pit Sioux Falls, South Dakota · EPA ID SDD000823559 | Cleaned up & deleted | 3.2 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 57186
Who supplies drinking water to ZIP 57186?
Kohala Ranch Water Co. (EPA ID HI0000151), a groundwater (wells) system serving about 850 people, listed by the state as serving this ZIP code.
Is there lead in Sioux Falls, SD tap water?
The utility’s latest 90th-percentile lead result (Jan 2019) was 10.8 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Sioux Falls, SD water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 57186 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 57186?
No active Superfund site within 10 miles of the ZIP center. Sites within 10 miles: Williams Pipe Line Co. Disposal Pit (3.2 mi, Cleaned up & deleted).
Is radon a problem in Minnehaha?
Minnehaha is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.