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City water profile

Green River water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Green River, Wyoming.

Median indexed hardness

387PPM

One indexed ZIP

Range 386.5–386.5 PPM

State comparison
152 PPM above
State hardness rank
#19 of 86
Matched utilities
6
Active health records
0

City summary

What the indexed records say

Green River has 1 published ZIP profile across Sweetwater County. The indexed median is 387 PPM, compared with 235 PPM across Wyoming.

Among the 86 Wyomingcities with an indexed median, Green River ranks #19from highest to lowest. Across all 97 state ZIP profiles, available estimates run from 3.2to 1905 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
15.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 5, 2016 to Jun 10, 2026.

ZIP directory

Water reports in Green River

Open a ZIP for site-level provenance and measurements.

ZIP code

82935

Very Hard

386.5 PPM

Nearest site
15.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Green River, City Of

PWSID WY5601181

Surface water
System population served
10,500
Last reported
Jun 29, 2026

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

Pioneer Mobile Home Park

PWSID WY5601173

Surface water
System population served
1,000
Last reported
Jun 29, 2026

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

Jamestown-Rio Vista W&s District

PWSID WY5600810

Surface water
System population served
560
Last reported
Jun 29, 2026

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

Desert Trails Mhp

PWSID WY5601608

Surface water
System population served
112
Last reported
Jun 29, 2026

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

Emerald River Estates

PWSID WY5601213

Surface water
System population served
62
Last reported
Jun 29, 2026

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

Rock Springs/green River Jpb

PWSID WY5600050

Surface water
System population served
25
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
Surface Water Treatment RuleWY5601213May 1, 2025Resolved
Revised Total Coliform RuleWY5601213May 1, 2025Resolved
Lead and Copper RuleWY5601213Jan 1, 2025Resolved
Revised Total Coliform RuleWY5601213Aug 1, 2024Resolved
Revised Total Coliform RuleWY5601608Feb 1, 2023Resolved
Surface Water Treatment RuleWY5601608Feb 1, 2023Resolved
Surface Water Treatment RuleWY5601173Dec 1, 2022Resolved
Revised Total Coliform RuleWY5601173Dec 1, 2022Resolved
Lead and Copper RuleWY5601608Oct 1, 2022Resolved
TTHMWY5601181Mar 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 Green River

Is the water hard?

The indexed city median is 387 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.