S

Spearfish, SD

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️5 health-based violations on record.
0
Water sources
20
Violations
0
Pollution sources
0
Self-reported
0
Lawsuits

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Reported illness & cancer claims

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Self-reported issues

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Pollution sources & reported claims near your water

Factories, greenhouses, and contaminated sites mapped around the water supply. Tap any circle for detail.

Critical High Medium Reported claim

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Public water systems

Saint Onge Sewer & Water Co

PWSID:
SD4600287
Source:
Ground water
Serves:
255 people

Spearfish

PWSID:
SD4600311
Source:
Ground water
Serves:
13,803 people

Ken'S Trailer Court

PWSID:
SD4600314
Source:
Ground water
Serves:
110 people

Lantern Estates

PWSID:
SD4600315
Source:
Ground water
Serves:
192 people

Walnut Park

PWSID:
SD4600316
Source:
Ground water
Serves:
180 people

Meadow Crest Sanitary District

PWSID:
SD4602258
Source:
Ground water
Serves:
63 people

Spearfish Meadows

PWSID:
SD4600875
Source:
Ground water
Serves:
87 people

Westview Homeowners Association

PWSID:
SD4600876
Source:
Ground water
Serves:
103 people

Mountain Plains 2 Homeowners Assoc

PWSID:
SD4602169
Source:
Ground water
Serves:
268 people

Centennial Hills Home Association

PWSID:
SD4602176
Source:
Ground water
Serves:
25 people

Bicentennial Trailer Court

PWSID:
SD4600426
Source:
Ground water
Serves:
23 people

Reynolds Court

PWSID:
SD4600160
Source:
Ground water
Serves:
28 people

Spring Creek Preserve

PWSID:
SD4602331
Source:
Ground water
Serves:
68 people

Two Bit Ranch Estates

PWSID:
SD4602319
Source:
Ground water
Serves:
30 people

Westfield Addition

PWSID:
SD4600521
Source:
Ground water
Serves:
104 people

Deberg Well Users Association

PWSID:
SD4602095
Source:
Ground water
Serves:
54 people

Lourie Lane Homeowners Assoc

PWSID:
SD4600416
Source:
Ground water
Serves:
75 people

Chris' Mobile Home Court

PWSID:
SD4600439
Source:
Ground water
Serves:
25 people

Riverside Mobile Home Court

PWSID:
SD4600508
Source:
Ground water
Serves:
75 people

Sunrise Homeowners Association

PWSID:
SD4600512
Source:
Ground water
Serves:
50 people

D & E Water Company

PWSID:
SD4600392
Source:
Ground water
Serves:
100 people

Spearfish Valley Mobile Estates

PWSID:
SD4600625
Source:
Ground water
Serves:
163 people

EPA & DEP violations

Mountain Plains 2 Homeowners Assoc

PWSID SD46021695 violations

  • Public Notice — Other violation

    medium severityUnaddressed

    Public Notice Other violation (Unaddressed).

    EPA SDWIS · Other · Began Dec 13, 2025 · 7 months ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedUnaddressed

    Groundwater Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 31, 2025 · 9 months ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityUnaddressed

    Consumer Confidence Rule Other violation (Unaddressed).

    EPA SDWIS · Other · Began Jul 1, 2025 · 1 year ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityUnaddressed

    Consumer Confidence Rule Other violation (Unaddressed).

    EPA SDWIS · Other · Began Jul 1, 2024 · 2 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityUnaddressed

    Consumer Confidence Rule Other violation (Unaddressed).

    EPA SDWIS · Other · Began Jul 1, 2023 · 3 years ago · Source ↗

City-wide

15 violations

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Mar 1, 2025 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Feb 1, 2025 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityResolved

    LEAD AND COPPER RULE REVISIONS RPT violation (Resolved).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedResolved

    LEAD AND COPPER RULE REVISIONS TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityResolved

    LEAD AND COPPER RULE REVISIONS RPT violation (Resolved).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedResolved

    LEAD AND COPPER RULE REVISIONS TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Chlorine — MR violation

    medium severityResolved

    Chlorine MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2024 · 2 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began May 1, 2024 · 2 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Feb 1, 2024 · 2 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Feb 1, 2024 · 2 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Nov 1, 2021 · 4 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Oct 1, 2021 · 4 years ago · Source ↗

  • Stage 1 Disinfectants and Disinfection Byproducts Rule — TT violation

    high severityHealth-basedResolved

    Stage 1 Disinfectants and Disinfection Byproducts Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 1, 2021 · 4 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Nov 20, 2020 · 5 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.