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City water profile

Joplin water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Joplin, Missouri.

Median indexed hardness

137PPM

2 indexed ZIPs

Range 130–144 PPM

State comparison
99 PPM below
State hardness rank
#476 of 504
Matched utilities
5
Active health records
0

City summary

What the indexed records say

Joplin has 2 published ZIP profiles across Jasper County and Newton County. The indexed median is 137 PPM, compared with 236 PPM across Missouri.

Among the 504 Missouricities with an indexed median, Joplin ranks #476from highest to lowest. Across all 556 state ZIP profiles, available estimates run from 38.3to 483 PPM.

The 130–144 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard2 ZIPs
Very hard0 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
4.8 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Jan 6, 2016 to Apr 21, 2026.

ZIP directory

Water reports in Joplin

Open a ZIP for site-level provenance and measurements.

ZIP code

64801

Hard

144 PPM

Nearest site
4.8 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

64804

Hard

130 PPM

Nearest site
0.2 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Mo American Joplin

PWSID MO5010413

Surface water
System population served
73,728
Last reported
Jun 16, 2026

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

Redings Mill Pws

PWSID MO5010678

Groundwater
System population served
163
Last reported
Jun 16, 2026

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

Big Valley Park Mhp

PWSID MO5048225

Groundwater
System population served
158
Last reported
Jun 16, 2026

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

Timberlost Mhp

PWSID MO5048274

Groundwater
System population served
150
Last reported
Jun 16, 2026

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

Park Place Mhp Joplin

PWSID MO5048995

Groundwater
System population served
62
Last reported
Jun 16, 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
E. COLIMO5048995Dec 1, 2025Resolved
LEAD AND COPPER RULE REVISIONSMO5010678Jul 2, 2025Unaddressed
Groundwater RuleMO5048274Jul 1, 2025Resolved
Revised Total Coliform RuleMO5048995Feb 1, 2025Resolved
Revised Total Coliform RuleMO5048274Nov 1, 2024Resolved
Groundwater RuleMO5048274Nov 1, 2024Resolved
LEAD AND COPPER RULE REVISIONSMO5048274Oct 17, 2024Unaddressed
LEAD AND COPPER RULE REVISIONSMO5048995Oct 17, 2024Resolved
Groundwater RuleMO5048274Oct 1, 2024Resolved
Groundwater RuleMO5048274Feb 1, 2024Resolved

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 Joplin

Is the water hard?

The indexed city median is 137 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.