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City water profile

Malta water quality

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

Median indexed hardness

800PPM

One indexed ZIP

Range 799.5–799.5 PPM

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

City summary

What the indexed records say

Malta has 1 published ZIP profile across Phillips County. The indexed median is 800 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Malta ranks #1from 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
69.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Sep 3, 2021 to Sep 25, 2024.

ZIP directory

Water reports in Malta

Open a ZIP for site-level provenance and measurements.

ZIP code

59538

Very Hard

799.5 PPM

Nearest site
69.9 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Malta City Of

PWSID MT0000284

Groundwater
System population served
1,800
Last reported
Jun 29, 2026

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

East Malta Colony

PWSID MT0001769

Groundwater
System population served
47
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 RuleMT0001769Oct 1, 2025Resolved
Consumer Confidence RuleMT0001769Jul 1, 2025Resolved
Nitrate-NitriteMT0000284Jan 1, 2025Resolved
Lead and Copper RuleMT0000284Dec 30, 2024Resolved
Consumer Confidence RuleMT0001769Jul 1, 2024Resolved
Nitrate-NitriteMT0001769Jan 1, 2024Resolved
Revised Total Coliform RuleMT0001769Aug 1, 2023Resolved
Consumer Confidence RuleMT0001769Jul 1, 2023Resolved
Nitrate-NitriteMT0000284Jan 1, 2023Resolved
Revised Total Coliform RuleMT0001769Feb 1, 2022Resolved

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 Malta

Is the water hard?

The indexed city median is 800 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.