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City water profile

Culbertson water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Culbertson, Montana.

Median indexed hardness

321PPM

One indexed ZIP

Range 321–321 PPM

State comparison
199 PPM above
State hardness rank
#16 of 117
Matched utilities
2
Active health records
0

City summary

What the indexed records say

Culbertson has 1 published ZIP profile across Roosevelt County. The indexed median is 321 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Culbertson ranks #16from highest to lowest. Across all 145 state ZIP profiles, available estimates run from 0.2to 799.5 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
31.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jan 12, 2016 to May 27, 2026.

ZIP directory

Water reports in Culbertson

Open a ZIP for site-level provenance and measurements.

ZIP code

59218

Very Hard

321 PPM

Nearest site
31.6 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Dry Prairie Rural Water Authority

PWSID MT0004348

Surface water
System population served
3,005
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Culbertson Town Of

PWSID MT0000192

Surface water
System population served
714
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

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
Lead and Copper RuleMT0004348Oct 1, 2024Unaddressed
Total Haloacetic Acids (HAA5)MT0004348Jan 1, 2024Resolved
TTHMMT0004348Jan 1, 2024Resolved

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 Culbertson

Is the water hard?

The indexed city median is 321 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.