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City water profile

Horn Lake water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Horn Lake, Mississippi.

Median indexed hardness

51PPM

One indexed ZIP

Range 51.1–51.1 PPM

State comparison
15 PPM below
State hardness rank
#69 of 109
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Horn Lake has 1 published ZIP profile across Desoto County. The indexed median is 51 PPM, compared with 66 PPM across Mississippi.

Among the 109 Mississippicities with an indexed median, Horn Lake ranks #69from highest to lowest. Across all 146 state ZIP profiles, available estimates run from 11.8to 2560 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

Soft1 ZIP
Moderately hard0 ZIPs
Hard0 ZIPs
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
4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Feb 29, 2016 to Jun 4, 2026.

ZIP directory

Water reports in Horn Lake

Open a ZIP for site-level provenance and measurements.

ZIP code

38637

Soft

51.1 PPM

Nearest site
4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Horn Lake

PWSID MS0170022

Groundwater
System population served
13,649
Last reported
May 18, 2026

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

Horn Lake Water Association

PWSID MS0170010

Groundwater
System population served
12,735
Last reported
May 18, 2026

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

City Of Horn Lake - Twin Lakes

PWSID MS0170025

Groundwater
System population served
1,948
Last reported
May 18, 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
Total Haloacetic Acids (HAA5)MS0170025Jan 1, 2024Resolved
TTHMMS0170025Jan 1, 2024Resolved
Total Haloacetic Acids (HAA5)MS0170010Oct 1, 2023Archived
TTHMMS0170010Oct 1, 2023Archived
TTHMMS0170025Jan 1, 2023Resolved
Total Haloacetic Acids (HAA5)MS0170025Jan 1, 2023Resolved

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 Horn Lake

Is the water hard?

The indexed city median is 51 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.