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Water Hardness in 78413

Corpus Christi, Texas · Nueces County

310 PPM
18.1 GPG
Very Hard
0Soft60120180300+
Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 4 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 4 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
4 verified treated-water sources
4 matched systems total for this ZIP; treated-water reports are prioritized when available.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 78413

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

4 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
City Of Corpus Christi
TX1780003
Very Hard
310 PPMsurface water318,387 servedVerified - Annual Water Quality Report
Source water: 170 PPM
Nueces County Wcid 4
TX1780006
Very Hard
310 PPMsurface water14,880 servedVerified - Annual Water Quality Report
Source water: 48 PPM
Nueces County Wcid 3
TX1780005
Very Hard
310 PPMsurface water14,000 servedVerified - Annual Water Quality Report
Source water: 221 PPM
Corpus Christi Naval Air Station
TX1780017
Very Hard
310 PPMsurface water7,048 servedVerified - Annual Water Quality Report
Source water: 48 PPM

Nearby Zip Codes

784143107841131078412310784163107841731078415310784043107840531078401310784083107840631078407310

What This Means For You

Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

MethodologyData sourcesHow to test your water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Corpus Christi, TX (78413).

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Frequently Asked Questions

Is the water hard in Corpus Christi, TX (78413)?

The average water hardness in 78413 is 310 PPM (18.1 GPG), which is classified as very hard.

Do I need a water softener in 78413?

With hardness of 310 PPM, a water softener is recommended for homes in 78413.

Is hard water in 78413 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 78413?

Zip code 78413 in Corpus Christi, Texas is served by 4 water systems.

Learn More About Your Water

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Water Hardness Scale: PPM and GPG Chart

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Well Water Hardness: Why It's Usually Hard & How to Treat It

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