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City water profile

Lima water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Lima, Ohio.

Median indexed hardness

334PPM

3 indexed ZIPs

Range 333.5–333.5 PPM

State comparison
108 PPM above
State hardness rank
#37 of 119
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Lima has 3 published ZIP profiles across Allen County. The indexed median is 334 PPM, compared with 226 PPM across Ohio.

Among the 119 Ohiocities with an indexed median, Lima ranks #37from highest to lowest. Across all 162 state ZIP profiles, available estimates run from 77.2to 387 PPM.

The 333.5–333.5 PPM range shows how much the available ZIP estimates vary within the city label. 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 hard3 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
49.8 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 0Low: 3

Observation window: Jan 7, 2016 to Jun 9, 2026.

ZIP directory

Water reports in Lima

Open a ZIP for site-level provenance and measurements.

ZIP code

45801

Very Hard

333.5 PPM

Nearest site
45.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

45804

Very Hard

333.5 PPM

Nearest site
49.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

45805

Very Hard

333.5 PPM

Nearest site
50 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Lima City

PWSID OH0200811

Surface water
System population served
65,619
Last reported
May 15, 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
TTHMOH0200811Apr 1, 2024Resolved · health-based
TTHMOH0200811Jan 1, 2022Resolved · 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 Lima

Is the water hard?

The indexed city median is 334 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.