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City water profile

Fairburn water quality

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

Median indexed hardness

526PPM

One indexed ZIP

Range 525.5–525.5 PPM

State comparison
10 PPM above
State hardness rank
#86 of 222
Matched utilities
1
Active health records
1

City summary

What the indexed records say

Fairburn has 1 published ZIP profile across Custer County. The indexed median is 526 PPM, compared with 516 PPM across South Dakota.

Among the 222 South Dakotacities with an indexed median, Fairburn ranks #86from 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.

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
19.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 9, 2016 to Nov 20, 2024.

ZIP directory

Water reports in Fairburn

Open a ZIP for site-level provenance and measurements.

ZIP code

57738

Very Hard

525.5 PPM

Nearest site
19.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Fairburn Water Association

PWSID SD4600877

Groundwater
System population served
65
Last reported
Jun 17, 2026

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

Compliance history

What EPA records show

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Revised Total Coliform RuleSD4600877Feb 1, 2026Archived
ChlorineSD4600877Jan 1, 2026Archived
LEAD AND COPPER RULE REVISIONSSD4600877Oct 17, 2024Resolved
LEAD AND COPPER RULE REVISIONSSD4600877Oct 17, 2024Resolved · health-based
Revised Total Coliform RuleSD4600877Jul 1, 2023Resolved
ChlorineSD4600877Jul 1, 2023Resolved
Revised Total Coliform RuleSD4600877Sep 1, 2021Resolved
ChlorineSD4600877Jul 1, 2021Resolved
Stage 1 Disinfectants and Disinfection Byproducts RuleSD4600877Dec 14, 2020Addressed · 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 Fairburn

Is the water hard?

The indexed city median is 526 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.