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City water profile

Harlowton water quality

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

Median indexed hardness

87PPM

One indexed ZIP

Range 86.5–86.5 PPM

State comparison
35 PPM below
State hardness rank
#72 of 117
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Harlowton has 1 published ZIP profile across Wheatland County. The indexed median is 87 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Harlowton ranks #72from 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 hard1 ZIP
Hard0 ZIPs
Very hard0 ZIPs

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
29.8 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Mar 4, 2017 to Sep 10, 2025.

ZIP directory

Water reports in Harlowton

Open a ZIP for site-level provenance and measurements.

ZIP code

59036

Moderately Hard

86.5 PPM

Nearest site
29.8 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Cmrwa Musselshell Judith Rural Water Sys

PWSID MT0005109

Groundwater
System population served
1,100
Last reported
Jun 29, 2026

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

Harlowton City Of

PWSID MT0000240

Groundwater
System population served
1,050
Last reported
Jun 29, 2026

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

Springwater Colony

PWSID MT0000719

Groundwater
System population served
100
Last reported
Jun 29, 2026

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

Duncan Ranch Colony

PWSID MT0000418

Groundwater
System population served
96
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
Consumer Confidence RuleMT0000240Jul 1, 2025Resolved
Lead and Copper RuleMT0000719Dec 30, 2024Resolved
Consumer Confidence RuleMT0000240Oct 1, 2024Resolved
Consumer Confidence RuleMT0000240Jul 1, 2024Resolved
Consumer Confidence RuleMT0000719Jul 1, 2024Resolved
Revised Total Coliform RuleMT0000240Jun 1, 2024Resolved
Consumer Confidence RuleMT0000240Jul 1, 2023Resolved
Consumer Confidence RuleMT0000719Jul 1, 2022Resolved
Lead and Copper RuleMT0000719Dec 30, 2021Resolved
Lead and Copper RuleMT0000418Dec 30, 2021Resolved

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 Harlowton

Is the water hard?

The indexed city median is 87 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.