Pasco County water report · Pasco County Regional
What's in Pasco County tap water
Pasco County Regional serves about 214,403 people. Its own testing from 2013 to 2024 shows 9 contaminants above EWG health guidelines, led by HAA9 at 181× the guideline. Its averages are within today's federal legal limits.
Pasco County's regional system serves much of the county. Check the name on your water bill.
Every result above the guidelines
Types found here: Disinfection by-products, Metals, Radioactive elements, PFAS, Nitrate.
| Contaminant | Average level | EWG health guideline | Federal legal limit | Times the guideline |
|---|---|---|---|---|
| Haloacetic acids (HAA9)Disinfection by-products | 10.9 ppb | 0.06 ppb | No federal limit | 181× |
| Total trihalomethanes (TTHMs)Disinfection by-products | 17.6 ppb | 0.15 ppb | 80 ppb | 117× |
| ArsenicMetals | 0.400 ppb | 0.004 ppb | 10 ppb | 100× |
| Haloacetic acids (HAA5)Disinfection by-products | 9.96 ppb | 0.1 ppb | 60 ppb | 100× |
| Dibromoacetic acidDisinfection by-products | 0.890 ppb | 0.03 ppb | No federal limit | 30× |
| Radium, combined (-226 and -228)Radioactive elements | 0.78 pCi/L | 0.05 pCi/L | 5 pCi/L | 16× |
| Chromium (hexavalent)Metals | 0.108 ppb | 0.02 ppb | No federal limit | 5.4× |
| PFOSPFAS | 1.24 ppt | 0.3 ppt | 4 ppt, from 2029 | 4.1× |
| NitrateNitrate | 0.303 ppm | 0.14 ppm | 10 ppm | 2.2× |
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, Radioactive elements, PFAS, Nitrate: 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 Pasco County yet
We open an area once a licensed local plumber has signed on. Leave your number and we'll text you the day we do.
Questions about Pasco County water
Does Pasco 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 9 contaminants above them. The figures are averages of the utility's own testing from 2013 to 2024.
What is HAA9, and why is it the highest in Pasco 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. Pasco County Regional averaged 10.9 ppb against EWG's guideline of 0.06 ppb, about 181× the guideline.
When will you install in Pasco 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 Pasco 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 Pasco County Regional ranks against 24 other large Florida systems in the Florida Tap Water Report 2026, or read what HAA9 and TTHM are.
Source: Pasco County Regional on the EWG Tap Water Database, utility testing averages 2013-2024, 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.