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City water profile

Brentwood water quality

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

Median indexed hardness

133PPM

One indexed ZIP

Range 133–133 PPM

State comparison
83 PPM above
State hardness rank
#52 of 222
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Brentwood has 1 published ZIP profile across Williamson County. The indexed median is 133 PPM, compared with 50 PPM across Tennessee.

Among the 222 Tennesseecities with an indexed median, Brentwood ranks #52from highest to lowest. Across all 323 state ZIP profiles, available estimates run from 4.5to 247 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard1 ZIP
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
21.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Mar 14, 2022 to Jan 7, 2026.

ZIP directory

Water reports in Brentwood

Open a ZIP for site-level provenance and measurements.

ZIP code

37027

Hard

133 PPM

Nearest site
21.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Brentwood Water Department

PWSID TN0000069

Surface water
System population served
30,493
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.

No violation records are included in the current lookback window.

Practical next steps

Move from index to evidence

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

Questions people ask

About water in Brentwood

Is the water hard?

The indexed city median is 133 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.