Is tap water safe in Franklin?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Franklin, TN?

Nearby USGS observations produce an estimate of 118 ppm (6.9 grains per gallon), classified as moderately hard. This is not a tap measurement.

Do I need a water softener in ZIP code 37064?

There is no high-hardness trigger in this profile. Confirm conditions with an at-home hardness test before purchasing equipment.

City water profile

Franklin water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Franklin, Tennessee.

Median indexed hardness

118PPM

3 indexed ZIPs

Range 103.5–118 PPM

State comparison: 68 PPM above
State hardness rank: #58 of 222
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Franklin has 3 published ZIP profiles across Williamson County. The indexed median is 118 PPM, compared with 50 PPM across Tennessee.

Among the 222 Tennesseecities with an indexed median, Franklin ranks #58from highest to lowest. Across all 323 state ZIP profiles, available estimates run from 4.5to 247 PPM.

The 103.5–118 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard3 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

3 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 16.3 miles
Profiles with evidence: 3/3

Confidence labels

High: 0Moderate: 3Low: 0

Observation window: Mar 8, 2022 to Jan 7, 2026.

ZIP directory

Water reports in Franklin

Open a ZIP for site-level provenance and measurements.

ZIP code

37064

Moderately Hard

118 PPM

Nearest site: 13.4 mi
Confidence: Moderate

View full ZIP evidence →

ZIP code

37067

Moderately Hard

103.5 PPM

Nearest site: 16.3 mi
Confidence: Moderate

View full ZIP evidence →

ZIP code

37069

Moderately Hard

118 PPM

Nearest site: 19.8 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Franklin Water Dept

PWSID TN0000246

Surface water

System population served: 77,222
Last reported: May 14, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

Record	System	Period	Status
Consumer Confidence Rule	TN0000246	Jul 1, 2025	Unaddressed
Public Notice	TN0000246	Mar 1, 2023	Resolved
TTHM	TN0000246	Jan 1, 2023	Resolved · health-based
TTHM	TN0000246	Oct 1, 2022	Resolved · health-based
TTHM	TN0000246	Jul 1, 2022	Resolved · health-based
Consumer Confidence Rule	TN0000246	Jul 1, 2021	Resolved
Consumer Confidence Rule	TN0000246	Jul 1, 2021	Resolved
Public Notice	TN0000246	Nov 25, 2019	Addressed

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Tennessee communities

Brentwood

Williamson County

133 PPM median

Nolensville

Williamson County

103 PPM median

Smyrna

Williamson County

111 PPM median

Crossville

Cumberland County

118 PPM median

Halls

Knox County

117 PPM median

Woodbury

Cannon County

116 PPM median

Search all 222 Tennessee cities →

Questions people ask

About water in Franklin

Is the water hard?

The indexed city median is 118 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.