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City water profile

Sidney water quality

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

Median indexed hardness

488PPM

One indexed ZIP

Range 488–488 PPM

State comparison
366 PPM above
State hardness rank
#5 of 117
Matched utilities
4
Active health records
1

City summary

What the indexed records say

Sidney has 1 published ZIP profile across Richland County. The indexed median is 488 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Sidney ranks #5from 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

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
11.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jul 6, 2016 to Sep 24, 2024.

ZIP directory

Water reports in Sidney

Open a ZIP for site-level provenance and measurements.

ZIP code

59270

Very Hard

488 PPM

Nearest site
11.4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Sidney City Of

PWSID MT0000330

Groundwater
System population served
5,000
Last reported
Jun 29, 2026

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

Dry Redwater Regional Water Authority

PWSID MT0004839

Groundwater
System population served
365
Last reported
Jun 29, 2026

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

Richland Co Valley View Wua

PWSID MT0000514

Groundwater
System population served
85
Last reported
Jun 29, 2026

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

Mount Pleasant Estates

PWSID MT0000644

Groundwater
System population served
45
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
TTHMMT0000514Apr 1, 2026Unaddressed · health-based
TTHMMT0000514Jan 1, 2026Archived · health-based
TTHMMT0000514Oct 1, 2025Archived · health-based
TTHMMT0000514Jul 1, 2025Archived · health-based
TTHMMT0000514Apr 1, 2025Archived · health-based
TTHMMT0000514Jan 1, 2025Archived · health-based
Lead and Copper RuleMT0000644Dec 30, 2024Resolved
TTHMMT0000514Oct 1, 2024Archived · health-based
Lead and Copper RuleMT0000644Oct 1, 2024Resolved
Revised Total Coliform RuleMT0000514Sep 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 Sidney

Is the water hard?

The indexed city median is 488 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.