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City water profile

Monroe water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Monroe, Louisiana.

Median indexed hardness

72PPM

5 indexed ZIPs

Range 53.2–71.7 PPM

State comparison
18 PPM below
State hardness rank
#35 of 52
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Monroe has 5 published ZIP profiles across Ouachita Parish. The indexed median is 72 PPM, compared with 90 PPM across Louisiana.

Among the 52 Louisianacities with an indexed median, Monroe ranks #35from highest to lowest. Across all 102 state ZIP profiles, available estimates run from 4.8to 314 PPM.

The 53.2–71.7 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

Soft2 ZIPs
Moderately hard3 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

5 of 5 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
32.1 miles
Profiles with evidence
5/5

Confidence labels

High: 0Moderate: 0Low: 5

Observation window: Jan 13, 2016 to Jun 10, 2026.

ZIP directory

Water reports in Monroe

Open a ZIP for site-level provenance and measurements.

ZIP code

71201

Soft

53.2 PPM

Nearest site
31.3 mi
Confidence
Low

View full ZIP evidence →

ZIP code

71202

Soft

53.2 PPM

Nearest site
28.2 mi
Confidence
Low

View full ZIP evidence →

ZIP code

71203

Moderately Hard

71.7 PPM

Nearest site
37.1 mi
Confidence
Low

View full ZIP evidence →

ZIP code

71209

Moderately Hard

71.7 PPM

Nearest site
32.5 mi
Confidence
Low

View full ZIP evidence →

ZIP code

71212

Moderately Hard

71.7 PPM

Nearest site
32.1 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Monroe Water System

PWSID LA1073031

Surface water
System population served
57,000
Last reported
Jun 23, 2026

A municipal system, in-state city, and served county all agree with this Census 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
Long Term 2 Enhanced Surface Water Treatment RuleLA1073031Jan 1, 2026Archived · health-based
Interim Enhanced Surface Water Treatment RuleLA1073031Jan 1, 2026Resolved · health-based
Interim Enhanced Surface Water Treatment RuleLA1073031Jan 1, 2026Archived · health-based
LEAD AND COPPER RULE REVISIONSLA1073031Oct 17, 2024Resolved · health-based

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 Monroe

Is the water hard?

The indexed city median is 72 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.