Collier County water report · Collier County Regional
What's in Naples & Collier County tap water
Collier County Regional serves about 171,370 people. Its own testing from 2014 to 2023 shows 4 contaminants above EWG health guidelines, led by HAA9 at 392× the guideline. Its averages are within today's federal legal limits.
Collier County's regional system serves much of the county. Some cities run their own systems, so check the name on your water bill.
Every result above the guidelines
Types found here: Disinfection by-products, Metals.
| Contaminant | Average level | EWG health guideline | Federal legal limit | Times the guideline |
|---|---|---|---|---|
| Haloacetic acids (HAA9)Disinfection by-products | 23.5 ppb | 0.06 ppb | No federal limit | 392× |
| Total trihalomethanes (TTHMs)Disinfection by-products | 46.3 ppb | 0.15 ppb | 80 ppb | 308× |
| Haloacetic acids (HAA5)Disinfection by-products | 22.1 ppb | 0.1 ppb | 60 ppb | 221× |
| Chromium (hexavalent)Metals | 0.194 ppb | 0.02 ppb | No federal limit | 9.7× |
What treats it
- Disinfection by-products (trihalomethanes, haloacetic acids and related compounds) form when chlorine or chloramine reacts with natural matter in the source water. Carbon filtration is the most common way to reduce them, and every Whole Home package includes a whole-home carbon stage, so it covers every tap and shower.
- Metals: reverse osmosis is the usual treatment for these at the tap you drink from. Our drinking-water tap add-on ($695) is a reverse osmosis system under the kitchen sink.
- Hard water isn't in this data. If you see white crust on faucets or shower glass, Filtration + Softening adds a softener for the scale.
We don't install in Naples & Collier County yet
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Questions about Naples & Collier County water
Does Collier County Regional water meet federal standards?
Its averages are within today's federal legal limits. EWG's health guidelines are far stricter than legal limits, which is why its testing shows 4 contaminants above them. The figures are averages of the utility's own testing from 2014 to 2023.
What is HAA9, and why is it the highest in Naples & Collier County?
Haloacetic acids (HAA9) is a disinfection by-product. It forms when the chlorine or chloramine used to disinfect the water reacts with natural matter in the source water. Collier County Regional averaged 23.5 ppb against EWG's guideline of 0.06 ppb, about 392× the guideline.
When will you install in Naples & Collier County?
We open an area once a licensed local plumber has signed on with us. Leave your number on this page and we'll text you when we do.
How much does whole-home water filtration cost in Naples & Collier County?
Our prices are the same everywhere we install: Whole Home Filtration is $2,995 installed, Filtration + Softening $4,495 and Total Protection $7,495, from about $64 a month on approved credit.
See how Collier County Regional ranks against 24 other large Florida systems in the Florida Tap Water Report 2026, or read what HAA9 and TTHM are.
Source: Collier County Regional on the EWG Tap Water Database, utility testing averages 2014-2023, compiled October 2026. EWG's health guidelines are far stricter than federal legal limits. Long-term averages describe the public supply, not any one home, and aren't the same as current compliance; see your utility's latest annual water quality report. Whole Home Company sells and installs home water treatment and isn't affiliated with any utility or with EWG.