City water profile

Water hardness in Naples

Find official utility reports, understand hardness, and check the water system serving your home in Naples, Florida.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: 71 PPM above
Evidence comparison rank: #2 of 19
Matched utilities: 4
Active health records: 0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Collier County Regional Wtp

FL5114069 · Groundwater · 216,993 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0012 mg/L
Action level: 0.015 mg/L

8% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 1, 2023

Violation history (9)

Imported violation history for Collier County Regional Wtp
Rule	Status	Period
Consumer Confidence Rule	Resolved	Jul 1, 2025 to Aug 9, 2025
Revised Total Coliform Rule	Resolved	May 1, 2025 to May 1, 2025
TTHM	Resolved	Oct 1, 2024 to Dec 10, 2024
Total Haloacetic Acids (HAA5)	Resolved	Oct 1, 2024 to Dec 10, 2024
Revised Total Coliform Rule	Resolved	Apr 1, 2024 to Jan 20, 2024
Revised Total Coliform Rule	Resolved	Jan 1, 2024 to Jan 20, 2024
TTHM	Resolved	Oct 1, 2023 to Dec 31, 2023
Total Haloacetic Acids (HAA5)	Resolved	Oct 1, 2023 to Dec 31, 2023
Nitrate	Archived	Jan 1, 2023 to Dec 31, 2023

Naples Water Dept

FL5110198 · Groundwater · 83,804 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0013 mg/L
Action level: 0.015 mg/L

9% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 1, 2023

Violation history (14)

Imported violation history for Naples Water Dept
Rule	Status	Period
Revised Total Coliform Rule	Archived	Nov 1, 2025 to Nov 30, 2025
E. COLI	Resolved	Aug 1, 2024 to Jun 1, 2024
E. COLI	Resolved	Jun 1, 2024 to Jun 1, 2024
E. COLI	Resolved	Apr 1, 2024 to Apr 30, 2024
E. COLI	Resolved	Apr 1, 2024 to Nov 12, 2024
E. COLI	Resolved	Apr 1, 2024 to Nov 12, 2024
E. COLI	Resolved	Apr 1, 2024 to Nov 12, 2024
Revised Total Coliform Rule	Resolved	Apr 1, 2024 to Nov 13, 2024
E. COLI	Resolved	Jan 1, 2024 to Jan 31, 2024
Revised Total Coliform Rule	Unaddressed	Nov 1, 2023
E. COLI	Unaddressed	Nov 1, 2023
E. COLI	Archived	Oct 1, 2023 to Oct 31, 2023
E. COLI	Unaddressed	Sep 1, 2023
Revised Total Coliform Rule	Archived	Jul 1, 2023 to Jul 31, 2023

Port Of The Islands

FL5110230 · Groundwater · 1,200 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (5)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 1.0e-4 mg/L
Action level: 0.015 mg/L

1% of the listed benchmark

Monitoring period: Jul 1, 2025 to Dec 1, 2025

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 1.35 mg/L
Action level: 1.3 mg/L

104% of the listed benchmark

Monitoring period: Dec 31, 1993 to Jun 30, 1994

Thallium, Total

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.104 MG/L
Maximum contaminant level: 0.002 MG/L

5200% of the listed benchmark

Monitoring period: Apr 1, 2024 to Jun 30, 2024

Arsenic

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.061 MG/L
Maximum contaminant level: 0.01 MG/L

610% of the listed benchmark

Monitoring period: Apr 1, 2024 to Jun 30, 2024

Antimony, Total

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.07 MG/L
Maximum contaminant level: 0.006 MG/L

1167% of the listed benchmark

Monitoring period: Apr 1, 2024 to Jun 30, 2024

Violation history (13)

Imported violation history for Port Of The Islands
Rule	Status	Period
E. COLI	Archived	Nov 1, 2025 to Nov 30, 2025
Consumer Confidence Rule	Unaddressed	Jul 1, 2024
Thallium, TotalHealth-based	Resolved	Apr 1, 2024 to Jun 30, 2024
ArsenicHealth-based	Resolved	Apr 1, 2024 to Jun 30, 2024
Antimony, TotalHealth-based	Resolved	Apr 1, 2024 to Jun 30, 2024
Revised Total Coliform Rule	Resolved	Dec 1, 2023 to Dec 31, 2023
E. COLI	Resolved	Dec 1, 2023 to Dec 31, 2023
Total Haloacetic Acids (HAA5)	Resolved	Jan 1, 2023 to Dec 31, 2023
Lead and Copper Rule	Resolved	Jan 1, 2023 to Mar 3, 2026
TTHM	Resolved	Jan 1, 2023 to Dec 31, 2023
Lead and Copper Rule	Unaddressed	Jan 1, 2022
Nitrate	Resolved	Jan 1, 2022 to Dec 31, 2022
Lead and Copper Rule	Addressed	Jun 1, 2003

Lee Cypress Co-Op

FL5110058 · Groundwater · 82 people served system-wide

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

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (4)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0046 mg/L
Action level: 0.015 mg/L

31% of the listed benchmark

Monitoring period: Jul 1, 2025 to Dec 1, 2025

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 2.38 mg/L
Action level: 1.3 mg/L

183% of the listed benchmark

Monitoring period: Jan 1, 2024 to Dec 1, 2024

Total Haloacetic Acids (HAA5)

EPA SDWIS reported health-based violation

Reported violation

Reported level: 73 UG/L
Maximum contaminant level: 0.06 UG/L

121667% of the listed benchmark

Monitoring period: Jul 1, 2022 to Sep 30, 2022

TTHM

EPA SDWIS reported health-based violation

Reported violation

Reported level: 99.975 UG/L
Maximum contaminant level: 0.08 UG/L

124969% of the listed benchmark

Monitoring period: Apr 1, 2022 to Jun 30, 2022

Violation history (12)

Imported violation history for Lee Cypress Co-Op
Rule	Status	Period
E. COLI	Resolved	Jun 1, 2024 to Jun 30, 2024
Revised Total Coliform Rule	Resolved	Jun 1, 2024 to Jun 30, 2024
Revised Total Coliform Rule	Resolved	Oct 1, 2023 to Oct 31, 2023
E. COLI	Resolved	Oct 1, 2023 to Oct 31, 2023
Lead and Copper Rule	Resolved	Jul 1, 2023 to Feb 16, 2024
Total Haloacetic Acids (HAA5)Health-based	Archived	Jul 1, 2022 to Sep 30, 2022
TTHMHealth-based	Archived	Apr 1, 2022 to Jun 30, 2022
Total Haloacetic Acids (HAA5)Health-based	Archived	Apr 1, 2022 to Jun 30, 2022
Total Haloacetic Acids (HAA5)Health-based	Archived	Jan 1, 2022 to Mar 31, 2022
TTHMHealth-based	Archived	Jan 1, 2022 to Mar 31, 2022
Total Haloacetic Acids (HAA5)Health-based	Resolved	Oct 1, 2021 to Dec 31, 2021
TTHMHealth-based	Resolved	Oct 1, 2021 to Dec 31, 2021

City summary

What the indexed records say

Naples has 6 published ZIP profiles across Collier County. The regional-evidence median is 353 PPM. Its comparison-eligible median is 353 PPM versus 282 PPM statewide.

Among the 19 Floridacities meeting the comparison standard, Naples ranks #2from highest to lowest. Across all 603 state ZIP profiles, available estimates run from 135to 816.5 PPM.

The 325–384.5 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: 5Moderate: 1Low: 0

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Florida communities

Bonita Springs

Collier County

320 PPM median

Everglades

Collier County

360 PPM median

Immokalee

Collier County

316 PPM median

Marco Island

Collier County

— No median

Vero Beach

Indian River County

354 PPM median

Port St. Lucie

St. Lucie County

348 PPM median

Search all 291 Florida cities →

Questions people ask

About water in Naples

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

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.