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City water profile

Clarksville water quality

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

Median indexed hardness

84PPM

3 indexed ZIPs

Range 54.1–103 PPM

State comparison
34 PPM above
State hardness rank
#82 of 222
Matched utilities
2
Active health records
0

City summary

What the indexed records say

Clarksville has 3 published ZIP profiles across Montgomery County. The indexed median is 84 PPM, compared with 50 PPM across Tennessee.

Among the 222 Tennesseecities with an indexed median, Clarksville ranks #82from highest to lowest. Across all 323 state ZIP profiles, available estimates run from 4.5to 247 PPM.

The 54.1–103 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard2 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
23.3 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 2Low: 1

Observation window: Jan 4, 2016 to May 20, 2026.

ZIP directory

Water reports in Clarksville

Open a ZIP for site-level provenance and measurements.

ZIP code

37040

Soft

54.1 PPM

Nearest site
23 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

37042

Moderately Hard

83.6 PPM

Nearest site
69.8 mi
Confidence
Low

View full ZIP evidence →

ZIP code

37043

Moderately Hard

103 PPM

Nearest site
23.3 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Clarksville Water Department

PWSID TN0000116

Surface water
System population served
251,864
Last reported
May 14, 2026

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

Cunningham East-Montg Wtp

PWSID TN0000929

Surface water
System population served
25
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.

RecordSystemPeriodStatus
AtrazineTN0000929Apr 1, 2022Resolved

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 Clarksville

Is the water hard?

The indexed city median is 84 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.