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City water profile

Naples water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Naples, Florida.

Median indexed hardness

319PPM

6 indexed ZIPs

Range 319–319 PPM

State comparison
39 PPM above
State hardness rank
#89 of 290
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Naples has 6 published ZIP profiles across Collier County. The indexed median is 319 PPM, compared with 280 PPM across Florida.

Among the 290 Floridacities with an indexed median, Naples ranks #89from highest to lowest. Across all 603 state ZIP profiles, available estimates run from 20to 374.5 PPM.

The 319–319 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
Hard0 ZIPs
Very hard6 ZIPs

6 of 6 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
4.2 miles
Profiles with evidence
6/6

Confidence labels

High: 0Moderate: 6Low: 0

Observation window: Apr 1, 2019 to Jan 28, 2026.

ZIP directory

Water reports in Naples

Open a ZIP for site-level provenance and measurements.

ZIP code

34101

Very Hard

319 PPM

Nearest site
10 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

34102

Very Hard

319 PPM

Nearest site
4.2 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

34103

Very Hard

319 PPM

Nearest site
0.9 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

34104

Very Hard

319 PPM

Nearest site
3.7 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

34105

Very Hard

319 PPM

Nearest site
1.6 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

34112

Very Hard

319 PPM

Nearest site
4.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Collier County Regional Wtp

PWSID FL5114069

Groundwater
System population served
216,993
Last reported
May 18, 2026

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

Naples Water Dept

PWSID FL5110198

Groundwater
System population served
83,804
Last reported
May 18, 2026

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

Port Of The Islands

PWSID FL5110230

Groundwater
System population served
1,200
Last reported
May 18, 2026

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

Lee Cypress Co-Op

PWSID FL5110058

Groundwater
System population served
82
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
Revised Total Coliform RuleFL5110198Nov 1, 2025Archived
E. COLIFL5110230Nov 1, 2025Archived
Consumer Confidence RuleFL5114069Jul 1, 2025Resolved
Revised Total Coliform RuleFL5114069May 1, 2025Resolved
TTHMFL5114069Oct 1, 2024Resolved
Total Haloacetic Acids (HAA5)FL5114069Oct 1, 2024Resolved
E. COLIFL5110198Aug 1, 2024Resolved
Consumer Confidence RuleFL5110230Jul 1, 2024Unaddressed
E. COLIFL5110198Jun 1, 2024Resolved
E. COLIFL5110058Jun 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 Naples

Is the water hard?

The indexed city median is 319 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.