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Local water dashboard

Official source aggregation

Water quality in Naples, FL 34101

A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Collier County.

6 reported benchmark flags
Primary matched system
Collier County Regional Wtp
Source water
Groundwater
County
Collier County
Profile updated

At a glance

What the current records say

Hardness

Very Hard

319 PPM · 18.7 GPG

Compliance screen

No active flag

0 active health-based records

Lead 90th percentile

1.0e-4 mg/L

1% of action level

Utility match

4 systems

Serves 216,993 people system-wide

Hardness meter

How hard is the water?

Very Hard

Estimated local hardness

USGS hardness classification scale

319 PPM

Soft
0–59Moderate
60–120Hard
121–180Very hard
181+

Parts per million

319

mg/L as CaCO₃ equivalent

Grains per gallon

18.7

1 GPG ≈ 17.1 PPM

What this means at home

At 319 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.

USGS sites used

41

Nearest site

10 mi

Observation range

Apr 1, 2019–Jan 28, 2026

Estimate confidence

Moderate

Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: COLLIER WELL NO. RO 10S AAK6612 (Well).USGS source documentation ↗

Regional context

Is 34101 typical?

These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.

Naples median

319 PPM

About the same

6 indexed ZIP readings · Range 319–319 PPM

Florida median

280 PPM

39 PPM higher

602 indexed ZIP readings · Range 20–374.5 PPM

EPA benchmark screen

Contaminant snapshot

Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.

1 pass6 fail

Lead (PB90)

1.0e-4 mg/L

Reported Dec 1, 2025

Copper (CU90)

2.38 mg/L

Reported Dec 1, 2024

Numerical coverage

7 comparable results

Missing values remain blank; absence is not treated as a pass.

Lead (90th percentile)

Measured in mg/L

Pass

Local 1.0e-4

EPA limit 0.015

Local level is 1% of the listed EPA limit.

Copper (90th percentile)

Measured in mg/L

Fail

Local 2.38

EPA limit 1.3

Local level is 183% of the listed EPA limit.

Thallium, Total

Measured in MG/L

Fail

Local 0.104

EPA limit 0.002

Local level is 5200% of the listed EPA limit.

Arsenic

Measured in MG/L

Fail

Local 0.061

EPA limit 0.01

Local level is 610% of the listed EPA limit.

Antimony, Total

Measured in MG/L

Fail

Local 0.07

EPA limit 0.006

Local level is 1167% of the listed EPA limit.

Total Haloacetic Acids (HAA5)

Measured in UG/L

Fail

Local 73

EPA limit 0.06

Local level is 121667% of the listed EPA limit.

TTHM

Measured in UG/L

Fail

Local 99.975

EPA limit 0.08

Local level is 124969% of the listed EPA limit.

Share of EPA benchmark

100% line = listed limit

EPA SDWIS compliance

Reported violation history

Open EPA source documentation ↗
2026Q2
All records
48
Health-based
10
Active health-based
0
Contaminant or ruleSystemStatusPeriod
Revised Total Coliform RuleFL5110198ArchivedNov 1, 2025through Nov 30, 2025
E. COLIFL5110230ArchivedNov 1, 2025through Nov 30, 2025
Consumer Confidence RuleFL5114069ResolvedJul 1, 2025through Aug 9, 2025
Revised Total Coliform RuleFL5114069ResolvedMay 1, 2025through May 1, 2025
TTHMFL5114069ResolvedOct 1, 2024through Dec 10, 2024
Total Haloacetic Acids (HAA5)FL5114069ResolvedOct 1, 2024through Dec 10, 2024
E. COLIFL5110198ResolvedAug 1, 2024through Jun 1, 2024
Consumer Confidence RuleFL5110230UnaddressedJul 1, 2024
E. COLIFL5110198ResolvedJun 1, 2024through Jun 1, 2024
E. COLIFL5110058ResolvedJun 1, 2024through Jun 30, 2024
Revised Total Coliform RuleFL5110058ResolvedJun 1, 2024through Jun 30, 2024
Revised Total Coliform RuleFL5114069ResolvedApr 1, 2024through Jan 20, 2024
E. COLIFL5110198ResolvedApr 1, 2024through Apr 30, 2024
E. COLIFL5110198ResolvedApr 1, 2024through Nov 12, 2024
E. COLIFL5110198ResolvedApr 1, 2024through Nov 12, 2024
E. COLIFL5110198ResolvedApr 1, 2024through Nov 12, 2024
Revised Total Coliform RuleFL5110198ResolvedApr 1, 2024through Nov 13, 2024
Thallium, TotalHealth-basedReported 0.104 MG/L · MCL 0.002FL5110230ResolvedApr 1, 2024through Jun 30, 2024
ArsenicHealth-basedReported 0.061 MG/L · MCL 0.01FL5110230ResolvedApr 1, 2024through Jun 30, 2024
Antimony, TotalHealth-basedReported 0.07 MG/L · MCL 0.006FL5110230ResolvedApr 1, 2024through Jun 30, 2024

No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.

Solutions matcher

Your personalized water action plan

Matched to Naples ZIP 34101 using 319 PPM nearby hardness and 7 reported measurement benchmarks.

2 matches

Scale protection

High-Capacity Whole House Water Softener

319 PPM is 3× the high-hardness trigger used by this matcher.

Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.

Compare whole-house systems

Drinking water protection

Under-Sink Reverse Osmosis System

Copper (90th percentile), Thallium, Total, Arsenic, Antimony, Total, Total Haloacetic Acids (HAA5), TTHM have a measured benchmark flag or active health-based SDWIS record in this profile.

A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.

Explore under-sink filtration

Affiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.

Nearby indexed reports

Compare ZIPs in Naples

Estimates can differ across a city because monitoring locations and associated systems differ.

View all Naples reports →

ZIP 34102

Very Hard

319PPM

ZIP 34103

Very Hard

319PPM

ZIP 34104

Very Hard

319PPM

ZIP 34105

Very Hard

319PPM

ZIP 34112

Very Hard

319PPM

Frequently asked

Water questions for Naples

Is tap water safe in Naples?+

EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.

How hard is the water?+

Nearby USGS observations produce an estimate of 319 PPM, or 18.7 grains per gallon, classified as very hard. This is not a household tap measurement.

Do I need a water softener?+

At 319 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.