BLACK HAWK, South Dakota Tap Water Quality

8,768 people served · 40 water systems

Failing

BLACK HAWK, South Dakota is a small town with 8,768 residents served by 40 distinct public water systems. Water service covers ZIP codes 57107, 57701, 57702, 57709, 57718, 57732, and 12 more.

BLACK HAWK has accumulated a significant number of EPA health-based violations. Reviewing the contaminants involved, requesting your utility's Consumer Confidence Report, and using certified point-of-use filtration is strongly advisable.

EPA reporting identifies Coliform Bacteria and Radium among the regulated contaminants associated with BLACK HAWK's recent health-based violations. Each contaminant has different sources, health implications, and recommended mitigation steps — links to the full EPA reference for each are listed alongside the violation history below.

Last updated: 2026-05-18 · Source: EPA SDWIS

Location

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Centered on ZIP-code centroids of water systems serving this city.

ZIP Codes Served

57107 57701 57702 57709 57718 57732 57744 57747 57754 57761 57763 57769 57783 57785 58653 59102 68713 81413

Health-Based Violations (Last 5 Years)

EPA Maximum Contaminant Level exceedances reported by water systems serving BLACK HAWK. Each entry explains the contaminant, the health risk, and recommended precautions, and links to a full guide.

Radiumradiological

EPA Code 4000 · Maximum Contaminant Level Exceedance

violations

EPA Limit

5 pCi/L

Last Reading

18 PCI/L

First Reported

Jul 2021

Most Recent

Apr 2025

What this violation means

Radium-226 and Radium-228 occur naturally in groundwater, particularly in regions with granite or sandstone aquifers. Long-term ingestion increases the risk of bone, sinus, and other cancers because radium concentrates in bone tissue.

Recommended precautions

→Reverse osmosis and ion exchange (water softeners) remove radium.
→Boiling does NOT remove radium and may concentrate it.
→Private well users in radium-rich geology should test every 3–5 years.

Read the complete guide to Radium

Coliform Bacteriamicrobial

EPA Code 0400 · Treatment Technique Violation

violations

EPA Limit

0 per 100 mL presence/absence

Last Reading

—

First Reported

Jan 2021

Most Recent

Jan 2021

What this violation means

Total coliform bacteria are themselves usually harmless, but their presence signals that the water distribution system has a vulnerability — typically a cracked pipe, loss of pressure, or back-siphonage — that could allow disease-causing pathogens to enter. Repeated coliform-positive samples trigger mandatory utility investigation.

Recommended precautions

→If your utility issues a boil-water advisory, boil all drinking and cooking water for at least one minute.
→Use bottled water until the advisory is lifted.
→Ice from icemakers and beverages made before the advisory should be discarded.
→UV light and chlorination both kill coliform bacteria — most home filters do not.

Read the complete guide to Coliform Bacteria

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Water Systems Serving BLACK HAWK

VIEWFIELD RURAL WATER SYSTEM

PWSID: SD4602287

220 served

NORRIS PEAK WATER USERS ASSOC

PWSID: SD4602349

30 served

PILLAR PEAK

PWSID: SD4602326

38 served

CANYON SPRINGS WATER AND SEWER DISTR

PWSID: SD4602311

163 served

EAGLE WATER COMPANY

PWSID: SD4602307

48 served

QUAAL WATER ASSOCIATION

PWSID: SD4602127

95 served

OAK MOUNTAIN COUNTRY ESTATES

PWSID: SD4602151

85 served

WILD TURKEY ESTATES II

PWSID: SD4602282

70 served

HIGH MEADOWS WATER COMPANY

PWSID: SD4600395

140 served

PEACEFUL PINES II

PWSID: SD4602000

71 served

2 violations

WHISPERING WILLOWS

PWSID: SD4602094

64 served

D & E WATER COMPANY

PWSID: SD4600392

100 served

SPRING CREEK ACRES

PWSID: SD4602252

172 served

COUNTRY ROAD ESTATES

PWSID: SD4602204

112 served

RENDEZVOUS RANCH

PWSID: SD4602210

195 served

VALHALLA ADDITION

PWSID: SD4602211

38 served

RUSHMORE RANCH ESTATES

PWSID: SD4602212

168 served

76 RANCH ESTATES

PWSID: SD4602259

40 served

GOLDEN VALLEY WATER COMPANY

PWSID: SD4602261

283 served

3 violations

WILD TURKEY ESTATES I

PWSID: SD4602281

33 served

THRALL MTN. PROPERTY OWNERS ASSOCIAT

PWSID: SD4600513

70 served

GOLDEN MEADOWS

PWSID: SD4600516

96 served

TERRY TROJAN WATER DISTRICT

PWSID: SD4600053

400 served

EDELWEISS MOUNTAIN IMPROVEMENT ASSOC

PWSID: SD4600273

70 served

RAPID CITY MOBILE HOME PARK

PWSID: SD4600257

170 served

PINE CLIFF ESTATES

PWSID: SD4600270

180 served

CROOKED OAKS CANYON HOMEOWNERS

PWSID: SD4600915

70 served

SHIRT TAIL GULCH DEVELOPMENT

PWSID: SD4602232

65 served

HIGH SHERIDAN RANCH

PWSID: SD4602234

38 served

HEARTLAND COUNTRY RANCHETTES

PWSID: SD4602235

95 served

DRY CREEK ESTATES

PWSID: SD4602241

233 served

WOODLAND HILLS SANITARY DISTRICT

PWSID: SD4600042

255 served

BLACK HAWK WATER USER DISTRICT

PWSID: SD4600043

4,500 served

HIGH MEADOWS RANCHETTES

PWSID: SD4600011

60 served

SACORA MOBILE HOME PARK

PWSID: SD4600546

42 served

OWANKA RURAL WATER SYSTEM

PWSID: SD4602310

52 served

THE TIMBERS

PWSID: SD4602376

33 served

PRAIRIE HAVEN SUBDIVISION

PWSID: SD4602322

105 served

9 violations

CENTENNIAL VISTA ESTATES

PWSID: SD4602280

44 served

THREE PEAKS WATER ASSOCIATION

PWSID: SD4602401

25 served

What Can You Do?

✅ Request your utility's annual Consumer Confidence Report (CCR) — required by law.
✅ Use an NSF-certified water filter if violations involve lead, arsenic, or PFAS.
✅ Run cold water for 30 seconds before drinking if you have older plumbing (reduces lead).
✅ Check back monthly — we update data from the EPA every 30 days.

About this data

This overview reflects EPA SDWIS data published as of 2026-05-18. It covers active Community Water Systems (CWS) that exceeded federal Maximum Contaminant Levels during the past five-year EPA reporting window. For up-to-the-minute information, request a current Consumer Confidence Report from your utility, or review the EPA's public dashboard.

Frequently Asked Questions

Is BLACK HAWK, South Dakota tap water safe to drink?▼

This city's water had numerous EPA violations in the last 5 years. Consider filtered water.

How many EPA violations does BLACK HAWK have?▼

BLACK HAWK has 14 EPA health-based water violations in the last 5 years across 40 water systems serving 8,768 people.

What contaminants have been found in BLACK HAWK water?▼

The following EPA-regulated contaminants have been detected: 0400, 4000. View details about each contaminant, health effects, and recommended precautions above in the violations table.

Should I use a water filter in BLACK HAWK?▼

Using an NSF-certified water filter is recommended if your area has violations involving lead, arsenic, or PFAS. For other contaminants, consult your local water utility. Check the annual Consumer Confidence Report (CCR) for detailed guidance.

What should I do if there are violations in BLACK HAWK?▼

Request your water utility's annual Consumer Confidence Report (CCR), which is required by the EPA. Follow the utility's guidance on boil water advisories. Run cold water for 30 seconds before drinking if you have older plumbing. Use an NSF-certified filter if needed based on your water system's violations.