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City water profile

Billings water quality

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

Median indexed hardness

235PPM

3 indexed ZIPs

Range 228–235 PPM

State comparison
113 PPM above
State hardness rank
#35 of 117
Matched utilities
10
Active health records
0

City summary

What the indexed records say

Billings has 3 published ZIP profiles across Yellowstone County. The indexed median is 235 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Billings ranks #35from highest to lowest. Across all 145 state ZIP profiles, available estimates run from 0.2to 799.5 PPM.

The 228–235 PPM range shows how much the available ZIP estimates vary within the city label. 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 hard3 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
48.4 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 0Low: 3

Observation window: Mar 9, 2016 to Jun 27, 2018.

ZIP directory

Water reports in Billings

Open a ZIP for site-level provenance and measurements.

ZIP code

59102

Very Hard

228 PPM

Nearest site
44 mi
Confidence
Low

View full ZIP evidence →

ZIP code

59105

Very Hard

235 PPM

Nearest site
48.4 mi
Confidence
Low

View full ZIP evidence →

ZIP code

59106

Very Hard

235 PPM

Nearest site
49.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Billings City Of

PWSID MT0000153

Surface water
System population served
114,000
Last reported
Jun 29, 2026

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

Billings Heights Co Water Dist Of

PWSID MT0000155

Surface water
System population served
12,000
Last reported
Jun 29, 2026

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

Lockwood Water And Sewer District

PWSID MT0000156

Surface water
System population served
5,900
Last reported
Jun 29, 2026

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

Pioneer Water Service

PWSID MT0004226

Surface water
System population served
900
Last reported
Jun 29, 2026

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

Estates At Yellowstone Llc

PWSID MT0000464

Groundwater
System population served
800
Last reported
Jun 29, 2026

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

Golden Meadows Subdivision

PWSID MT0005141

Surface water
System population served
772
Last reported
Jun 29, 2026

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

Fisher Water Service

PWSID MT0001848

Surface water
System population served
750
Last reported
Jun 29, 2026

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

Hillside Village

PWSID MT0003808

Surface water
System population served
650
Last reported
Jun 29, 2026

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

Cherry Creek Estates Llc

PWSID MT0004392

Surface water
System population served
600
Last reported
Jun 29, 2026

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

Windsor Estates

PWSID MT0003807

Surface water
System population served
530
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
Nitrate-NitriteMT0005118May 1, 2026Resolved
Revised Total Coliform RuleMT0006002Apr 1, 2026Resolved
Revised Total Coliform RuleMT0005232Apr 1, 2026Archived
Groundwater RuleMT0004507Mar 1, 2026Archived
Revised Total Coliform RuleMT0005232Mar 1, 2026Archived
Revised Total Coliform RuleMT0005232Feb 1, 2026Archived
TTHMMT0000155Jan 1, 2026Archived
Total Haloacetic Acids (HAA5)MT0000155Jan 1, 2026Archived
Lead and Copper RuleMT0005017Jan 1, 2026Resolved
Revised Total Coliform RuleMT0005190Jan 1, 2026Resolved

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 Billings

Is the water hard?

The indexed city median is 235 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.