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City water profile

O'Neill water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for O'Neill, Nebraska.

Median indexed hardness

538PPM

One indexed ZIP

Range 538–538 PPM

State comparison
229 PPM above
State hardness rank
#28 of 409
Matched utilities
2
Active health records
0

City summary

What the indexed records say

O'Neill has 1 published ZIP profile across Holt County. The indexed median is 538 PPM, compared with 309 PPM across Nebraska.

Among the 409 Nebraskacities with an indexed median, O'Neill ranks #28from highest to lowest. Across all 476 state ZIP profiles, available estimates run from 72.3to 1245 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
45 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Aug 9, 2016 to May 18, 2026.

ZIP directory

Water reports in O'Neill

Open a ZIP for site-level provenance and measurements.

ZIP code

68763

Very Hard

538 PPM

Nearest site
45 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Oneill, City Of

PWSID NE3108904

Groundwater
System population served
3,705
Last reported
Jun 30, 2026

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

East Park Estates

PWSID NE3108908

Groundwater
System population served
100
Last reported
Jun 30, 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
Lead and Copper RuleNE3108908Oct 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 O'Neill

Is the water hard?

The indexed city median is 538 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.