WH

Water Hardness in 37072

Goodlettsville, Tennessee · Davidson County

100 PPM
5.8 GPG
Slightly Hard
0Soft60120180300+
Verified - Annual Water Quality Report

Dataset updated March 9, 2026Matched to 3 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 3 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
3 verified treated-water sources
3 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 37072

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.

3 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.
Metro Water Services
TN0000494
Slightly Hard
100 PPMsurface water778,153 servedVerified - Annual Water Quality Report
Source water: 234 PPM
Madison Suburban U.D.
TN0000424
Slightly Hard
100 PPMsurface water81,203 servedVerified - Annual Water Quality Report
Source water: 234 PPM
Harpeth Valley U.D.
TN0000286
Slightly Hard
100 PPMsurface water64,359 servedVerified - Annual Water Quality Report
Source water: 234 PPM

Nearby Zip Codes

370732343718910037115100370751003720710037080100371881003721610037138100372281003720610037208100

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 Goodlettsville, TN (37072).

Submit Your Data

Frequently Asked Questions

Is the water hard in Goodlettsville, TN (37072)?

The average water hardness in 37072 is 100 PPM (5.8 GPG), which is classified as slightly hard.

Do I need a water softener in 37072?

At 100 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 37072 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 37072?

Zip code 37072 in Goodlettsville, Tennessee is served by 3 water systems.

Learn More About Your Water

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

8 min read

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

10 min read

TDS vs Water Hardness: What's the Difference?

TDS and water hardness measure different things. Learn why a TDS meter can't tell you if your water is hard, and which test you actually need.

7 min read