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City water profile

Decatur water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Decatur, Alabama.

Median indexed hardness

75PPM

3 indexed ZIPs

Range 68.6–99.6 PPM

State comparison
37 PPM above
State hardness rank
#77 of 281
Matched utilities
2
Active health records
0

City summary

What the indexed records say

Decatur has 3 published ZIP profiles across Morgan County and Limestone County. The indexed median is 75 PPM, compared with 38 PPM across Alabama.

Among the 281 Alabamacities with an indexed median, Decatur ranks #77from highest to lowest. Across all 406 state ZIP profiles, available estimates run from 7.4to 2810 PPM.

The 68.6–99.6 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
4.6 miles
Profiles with evidence
3/3

Confidence labels

High: 0Moderate: 3Low: 0

Observation window: Jul 30, 2019 to Aug 28, 2025.

ZIP directory

Water reports in Decatur

Open a ZIP for site-level provenance and measurements.

ZIP code

35601

Moderately Hard

74.9 PPM

Nearest site
4.6 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

35603

Moderately Hard

68.6 PPM

Nearest site
7.6 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

35671

Moderately Hard

99.6 PPM

Nearest site
1.8 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Decatur, Municipal Ub Of

PWSID AL0001084

Surface water
System population served
77,103
Last reported
May 18, 2026

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

West Morgan-East Lawrence W&s Authority

PWSID AL0001092

Surface water
System population served
30,000
Last reported
May 18, 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
CARBON, TOTALAL0001092Oct 1, 2022Resolved
ArsenicAL0001092Jan 1, 2022Resolved
CadmiumAL0001092Jan 1, 2022Resolved
ChromiumAL0001092Jan 1, 2022Resolved
CYANIDEAL0001092Jan 1, 2022Resolved
FluorideAL0001092Jan 1, 2022Resolved
Antimony, TotalAL0001092Jan 1, 2022Resolved
SeleniumAL0001092Jan 1, 2022Resolved
NitrateAL0001092Jan 1, 2022Resolved
BariumAL0001092Jan 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 Decatur

Is the water hard?

The indexed city median is 75 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.