Nitrate in Black Hawk, SD Drinking Water
Nitrate data for Black Hawk, South Dakota · 7,329 residents · 1 ZIP code
In Black Hawk, South Dakota, Nitrate has been detected in the public water supply — a contaminant that health agencies track because of documented effects associated with prolonged exposure at elevated concentrations.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-04-05
Nitrate in Black Hawk Tap Water
Black Hawk, South Dakota has 1 EPA violation related to nitrate in drinking water.
This analysis covers 7,329 residents across 1 ZIP code in Black Hawk.
Black Hawk's overall water quality grade is B (82/100).
Is Nitrate in Black Hawk Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or ion exchange filter certified under NSF 53 / NSF 58 and testing your water independently.
EPA Violations for Nitrate in Black Hawk
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2021-07-01 | Nitrate (Resolved) | Resolved | 57718 |
Health Effects of Nitrate
- Methemoglobinemia ("blue baby syndrome") in infants under 6 months
- Increased risk of colorectal and bladder cancer (long-term)
- Thyroid disease from chronic exposure
- Possible reproductive effects
Health risk severity: High. Governed by the National Primary Drinking Water Regulations.
How Nitrate Gets Into Drinking Water
- Agricultural fertilizer runoff
- Animal feedlot operations and manure
- Septic system leachate
- Urban stormwater and wastewater discharge
What to Do About Nitrate in Black Hawk Water
- Reverse osmosis is the most effective method for nitrate removal
- Ion exchange systems designed for nitrate can also work
- Standard carbon filters do NOT remove nitrate
- Boiling water increases nitrate concentration — never boil for nitrate
Look for filters certified under NSF 53 / NSF 58 for nitrate removal.