Where does the water in 37331 come from?

Water for zip code 37331 in Etowah, Tennessee is provided by 3 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 37331

Etowah, Tennessee · Mcminn County

258 PPM

15.1 GPG

Very Hard

0Soft60120180300+

High Confidence — USGS Monitoring

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

2 USGS-backed sources

3 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

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 37331

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.

Water System	Source	Hardness	Pop. Served	Data Source
Athens Utilities Board TN0000024	surface water	160 PPM Moderately Hard	25,851	Estimated — County Avg
Etowah Utilities TN0000233	surface water	516 PPM Very Hard	12,851	High Confidence — USGS Monitoring
Tellico Plains Water Dept TN0000693	groundwater	155 PPM Moderately Hard	7,759	High Confidence — USGS Monitoring

Athens Utilities Board

TN0000024

Moderately Hard

160 PPMsurface water25,851 servedEstimated — County Avg

Etowah Utilities

TN0000233

Very Hard

516 PPMsurface water12,851 servedHigh Confidence — USGS Monitoring

Tellico Plains Water Dept

TN0000693

Moderately Hard

155 PPMgroundwater7,759 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

3732560 37329268 3736960 37370259 3731050 37303278 37309263 37307516 3733360 37385168 37354170 37826267

What This Means For You

Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

Recommended Products

Salt-Based Water Softener

Our PickAFWFilters Fleck 5600SXT 48K Also GreatWhirlpool WHES40E 40K Also GreatAFWFilters 64K Grain Also GreatAFWFilters Iron Pro 2 64K Also GreatSpringWell Filter + Softener Combo

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Whole-House Water Filter

Our PickiSpring WGB32B 3-Stage

Water Softener Salt

Our PickMorton Clean & Protect Also GreatDiamond Crystal Bright & Soft

Shower Head Filter

Our PickWeddell Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | 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 Etowah, TN (37331).

Submit Your Data

Frequently Asked Questions

Is the water hard in Etowah, TN (37331)?

The average water hardness in 37331 is 258 PPM (15.1 GPG), which is classified as very hard.

Do I need a water softener in 37331?

With hardness of 258 PPM, a water softener is recommended for homes in 37331.

Is hard water in 37331 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 37331?

Zip code 37331 in Etowah, Tennessee is served by 3 water systems.