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City water profile

Belle Fourche water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Belle Fourche, South Dakota.

Median indexed hardness

972PPM

One indexed ZIP

Range 972–972 PPM

State comparison
456 PPM above
State hardness rank
#45 of 222
Matched utilities
7
Active health records
0

City summary

What the indexed records say

Belle Fourche has 1 published ZIP profile across Butte County. The indexed median is 972 PPM, compared with 516 PPM across South Dakota.

Among the 222 South Dakotacities with an indexed median, Belle Fourche ranks #45from highest to lowest. Across all 246 state ZIP profiles, available estimates run from 20.5to 1330 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
67.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Aug 23, 2016 to Nov 20, 2024.

ZIP directory

Water reports in Belle Fourche

Open a ZIP for site-level provenance and measurements.

ZIP code

57717

Very Hard

972 PPM

Nearest site
67.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Belle Fourche

PWSID SD4600037

Groundwater
System population served
5,617
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Rimrock Water Company Llc

PWSID SD4602220

Groundwater
System population served
365
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Hay Creek Water Company

PWSID SD4602143

Groundwater
System population served
323
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Black Hills Water Distribution, Llc

PWSID SD4602144

Groundwater
System population served
135
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Fruitdale

PWSID SD4600135

Groundwater
System population served
75
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Whispering Pines Water Association

PWSID SD4600268

Groundwater
System population served
48
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Red Water Distribution Llc

PWSID SD4602257

Groundwater
System population served
35
Last reported
Jun 17, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Revised Total Coliform RuleSD4602143Jun 1, 2025Resolved
Revised Total Coliform RuleSD4600135Oct 1, 2023Resolved
Revised Total Coliform RuleSD4602220Oct 1, 2022Resolved
ChlorineSD4602220Oct 1, 2022Resolved
Total Haloacetic Acids (HAA5)SD4602220Aug 1, 2022Resolved
TTHMSD4602220Aug 1, 2022Resolved
TTHMSD4602143Aug 1, 2022Resolved
Total Haloacetic Acids (HAA5)SD4602143Aug 1, 2022Resolved
Lead and Copper RuleSD4602143Jan 1, 2022Resolved
Stage 1 Disinfectants and Disinfection Byproducts RuleSD4602257Aug 4, 2021Resolved · health-based

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Belle Fourche

Is the water hard?

The indexed city median is 972 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.