Where does the water in 93230 come from?

Water for zip code 93230 in Hanford, California is provided by 8 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 93230

Hanford, California · Kings County

146 PPM

8.5 GPG

Moderately Hard

0Soft60120180300+

Verified - State Lab Tested

Dataset updated March 9, 2026Matched to 8 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 8 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

1 verified treated-water source

8 matched systems total for this ZIP; treated-water reports are prioritized when available.

Water source profile

Primarily groundwater

Groundwater commonly picks up calcium and magnesium after contact with rock and soil. This profile is weighted by known population served across matched systems.

Data recency

Report years 2024

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 93230

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.

8 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.

Water System	Source	Hardness	Pop. Served	Data Source
Hanford, City Of CA1610003	groundwater	108 PPM Slightly Hard	62,127	High Confidence - USGS Monitoring
Lemoore, City Of CA1610005	groundwater	45 PPM Soft	27,185	High Confidence - USGS Monitoring
Corcoran, City Of CA1610004	groundwater	160 PPM Moderately Hard	22,808	High Confidence - USGS Monitoring
Lemoore Naval Air Station CA1610700	surface water	514 PPM Very Hard	15,000	High Confidence - USGS Monitoring
Avenal, City Of CA1610002	surface water	97 PPM Slightly Hard USGS estimate: 109 PPM	13,696	Verified - State Lab Tested(2024)

Hanford, City Of

CA1610003

Slightly Hard

108 PPMgroundwater62,127 servedHigh Confidence - USGS Monitoring

Lemoore, City Of

CA1610005

Soft

45 PPMgroundwater27,185 servedHigh Confidence - USGS Monitoring

Corcoran, City Of

CA1610004

Moderately Hard

160 PPMgroundwater22,808 servedHigh Confidence - USGS Monitoring

Lemoore Naval Air Station

CA1610700

Very Hard

514 PPMsurface water15,000 servedHigh Confidence - USGS Monitoring

Avenal, City Of

CA1610002

Slightly Hard

97 PPMsurface water13,696 servedVerified - State Lab Tested

Source water: 109 PPM

Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

93202143 93245146 93242163 93277201 93673201 93631163 93266146 93291201 93274201 93662163 93212146 93656163

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.

Methodology Data sources How 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 Hanford, CA (93230).

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Frequently Asked Questions

Is the water hard in Hanford, CA (93230)?

The average water hardness in 93230 is 146 PPM (8.5 GPG), which is classified as moderately hard.

Do I need a water softener in 93230?

With hardness of 146 PPM, a water softener is worth considering for homes in 93230.

Is hard water in 93230 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 93230?

Zip code 93230 in Hanford, California is served by 8 water systems.