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City water profile

Port Lavaca water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Port Lavaca, Texas.

Median indexed hardness

84PPM

One indexed ZIP

Range 84.2–84.2 PPM

State comparison
27 PPM below
State hardness rank
#412 of 523
Matched utilities
1
Active health records
1

City summary

What the indexed records say

Port Lavaca has 1 published ZIP profile across Calhoun County. The indexed median is 84 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Port Lavaca ranks #412from highest to lowest. Across all 1,026 state ZIP profiles, available estimates run from 5.4to 500.5 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 hard1 ZIP
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
19.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jan 28, 2016 to Jun 9, 2026.

ZIP directory

Water reports in Port Lavaca

Open a ZIP for site-level provenance and measurements.

ZIP code

77979

Moderately Hard

84.2 PPM

Nearest site
19.9 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Port Lavaca

PWSID TX0290002

Surface water
System population served
12,000
Last reported
Jun 26, 2026

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

Compliance history

What EPA records show

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Public NoticeTX0290002May 4, 2026Unaddressed
TTHMTX0290002Apr 1, 2026Unaddressed · health-based
TTHMTX0290002Jan 1, 2026Archived · health-based
Public NoticeTX0290002Oct 24, 2025Resolved
TTHMTX0290002Oct 1, 2025Archived · health-based
LEAD AND COPPER RULE REVISIONSTX0290002Jul 2, 2025Resolved
TTHMTX0290002Jul 1, 2025Archived · health-based
TTHMTX0290002Apr 1, 2025Archived · health-based
TTHMTX0290002Jan 1, 2025Archived · health-based
Lead and Copper RuleTX0290002Dec 30, 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 Port Lavaca

Is the water hard?

The indexed city median is 84 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.