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City water profile

Columbia water quality

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

Median indexed hardness

461PPM

One indexed ZIP

Range 461–461 PPM

State comparison
395 PPM above
State hardness rank
#17 of 109
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Columbia has 1 published ZIP profile across Marion County. The indexed median is 461 PPM, compared with 66 PPM across Mississippi.

Among the 109 Mississippicities with an indexed median, Columbia ranks #17from 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. 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
56.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jan 5, 2016 to Dec 7, 2021.

ZIP directory

Water reports in Columbia

Open a ZIP for site-level provenance and measurements.

ZIP code

39429

Very Hard

461 PPM

Nearest site
56.6 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Columbia

PWSID MS0460003

Groundwater
System population served
5,900
Last reported
May 18, 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 RULE REVISIONSMS0460003Oct 17, 2024Resolved · health-based
LEAD AND COPPER RULE REVISIONSMS0460003Oct 17, 2024Resolved
TTHMMS0460003Jan 1, 2024Resolved
Total Haloacetic Acids (HAA5)MS0460003Jan 1, 2024Resolved
TTHMMS0460003Jan 1, 2023Resolved
Total Haloacetic Acids (HAA5)MS0460003Jan 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 Columbia

Is the water hard?

The indexed city median is 461 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.