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City water profile

Nowata water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Nowata, Oklahoma.

Median indexed hardness

153PPM

One indexed ZIP

Range 153–153 PPM

State comparison
73 PPM below
State hardness rank
#81 of 108
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Nowata has 1 published ZIP profile across Nowata County. The indexed median is 153 PPM, compared with 226 PPM across Oklahoma.

Among the 108 Oklahomacities with an indexed median, Nowata ranks #81from highest to lowest. Across all 148 state ZIP profiles, available estimates run from 7to 610 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
Hard1 ZIP
Very hard0 ZIPs

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
58 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jan 26, 2016 to Apr 20, 2026.

ZIP directory

Water reports in Nowata

Open a ZIP for site-level provenance and measurements.

ZIP code

74048

Hard

153 PPM

Nearest site
58 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Nowata Municipal Authority

PWSID OK1021503

Surface water
System population served
3,971
Last reported
May 13, 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.

RecordSystemPeriodStatus
LEAD AND COPPER RULE REVISIONSOK1021503Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSOK1021503Oct 17, 2024Resolved
TTHMOK1021503Apr 1, 2024Archived · health-based
TTHMOK1021503Apr 1, 2024Archived · health-based
TTHMOK1021503Jan 1, 2024Archived · health-based
TTHMOK1021503Jan 1, 2024Archived · health-based
TTHMOK1021503Oct 1, 2023Archived · health-based
TTHMOK1021503Oct 1, 2023Archived · health-based
TTHMOK1021503Jul 1, 2023Archived · health-based
TTHMOK1021503Jul 1, 2023Archived · health-based

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 Nowata

Is the water hard?

The indexed city median is 153 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.