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City water profile

Basin water quality

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

Median indexed hardness

38PPM

One indexed ZIP

Range 37.7–37.7 PPM

State comparison
84 PPM below
State hardness rank
#92 of 117
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Basin has 1 published ZIP profile across Jefferson County. The indexed median is 38 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Basin ranks #92from 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.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard0 ZIPs
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
10 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jun 9, 2016 to Sep 14, 2017.

ZIP directory

Water reports in Basin

Open a ZIP for site-level provenance and measurements.

ZIP code

59631

Soft

37.7 PPM

Nearest site
10 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Basin County Water And Sewer Dist

PWSID MT0000014

Groundwater
System population served
200
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 RuleMT0000014Oct 1, 2023Resolved
Consumer Confidence RuleMT0000014Jul 1, 2023Resolved
Lead and Copper RuleMT0000014Jul 1, 2023Resolved
Lead and Copper RuleMT0000014Sep 29, 2022Resolved
Consumer Confidence RuleMT0000014Jul 1, 2022Resolved
Lead and Copper RuleMT0000014Apr 1, 2022Resolved
Lead and Copper RuleMT0000014Feb 8, 2021Resolved · health-based
Nitrate-NitriteMT0000014Jan 1, 2021Resolved
Lead and Copper RuleMT0000014Dec 30, 2014Addressed
Lead and Copper RuleMT0000014Jan 1, 2014Addressed

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 Basin

Is the water hard?

The indexed city median is 38 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.