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City water profile

East Grand Forks water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for East Grand Forks, Minnesota.

Median indexed hardness

636PPM

One indexed ZIP

Range 635.5–635.5 PPM

State comparison
318 PPM above
State hardness rank
#4 of 250
Matched utilities
1
Active health records
0

City summary

What the indexed records say

East Grand Forks has 1 published ZIP profile across Polk County. The indexed median is 636 PPM, compared with 318 PPM across Minnesota.

Among the 250 Minnesotacities with an indexed median, East Grand Forks ranks #4from highest to lowest. Across all 321 state ZIP profiles, available estimates run from 46.1to 716 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
4.7 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 8, 2016 to Jun 1, 2026.

ZIP directory

Water reports in East Grand Forks

Open a ZIP for site-level provenance and measurements.

ZIP code

56721

Very Hard

635.5 PPM

Nearest site
4.7 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

East Grand Forks

PWSID MN1600004

Surface water
System population served
9,206
Last reported
May 28, 2026

A municipal system, in-state city, and served county all agree with this Census 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.

No violation records are included in the current lookback window.

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 East Grand Forks

Is the water hard?

The indexed city median is 636 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.