Where does the water in 40023 come from?

Water for zip code 40023 in Fisherville, Kentucky is provided by 1 water system. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 40023

Fisherville, Kentucky · Jefferson County

120 PPM

7 GPG

Moderately Hard

0Soft60120180300+

Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 1 water systemTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 1 matched water system. 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

1 matched system 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 40023

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.

1 water system

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
Louisville Water Company KY0560258	surface water	120 PPM Moderately Hard USGS estimate: 64 PPM	764,769	Verified - Annual Water Quality Report

Louisville Water Company

KY0560258

Moderately Hard

120 PPMsurface water764,769 servedVerified - Annual Water Quality Report

Source water: 64 PPM

Nearby Zip Codes

4002264 40299120 4006764 40245120 40243120 40291120 4007164 40223120 40056188 40220120 4004764 40228120

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 Fisherville, KY (40023).

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Frequently Asked Questions

Is the water hard in Fisherville, KY (40023)?

The average water hardness in 40023 is 120 PPM (7 GPG), which is classified as moderately hard.

Do I need a water softener in 40023?

With hardness of 120 PPM, a water softener is worth considering for homes in 40023.

Is hard water in 40023 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 40023?

Zip code 40023 in Fisherville, Kentucky is served by 1 water system.