Pennsylvania American Water Coatesville District water quality
PA American Water's Coatesville system treats reservoir and Brandywine water and disinfects with chloramine. The water is fairly soft, around 4 grains per gallon, and its 2025 report found no PFOA or PFOS. Here is what's in the 2025 report, in plain English, and what it means for your home.
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PA American Water water, by the numbers
From the Pennsylvania American Water, 2025 Water Quality Report, Coatesville, with EPA records where noted.
| 2025 result | |
|---|---|
| Source | Rock Run Reservoir and the West Branch of the Brandywine |
| People served | About 37,000 (EPA) |
| Areas served | Coatesville, Thorndale, Sadsburyville, Pomeroy and nearby townships |
| Disinfectant | Chloramine |
| Hardness | About 4.2 grains per gallon on average (2.5–6 gpg, fairly soft) |
| PFAS | PFOA and PFOS not detected in the 2025 report |
| Nitrate | Up to 2.84 ppm (limit 10) |
| Lead | 2 ppb at the 90th percentile (action level 15) |
| Trihalomethanes | Up to 22 ppb (limit 80) |
What these numbers mean for your home
Chloramine, not chlorine. PA American Water uses chloramine, which lasts longer in the pipes and is harder to filter than chlorine. It takes catalytic carbon and enough contact time, so tell us you're on PA American Water and we'll size the filter for it. Whole-home filtration →
No PFOA or PFOS detected. Good news. If you want extra protection for drinking water, reverse osmosis also reduces lead, nitrate and sodium. Reverse osmosis →
Fairly soft water. Most homes here don't need a softener. Carbon filtration and RO are the usual upgrades. How hardness works →
Water treatment for PA American Water customers
How it works
Request your instant free quote
Fill out the free quote form or call (610) 400-3132. Tell us your address and that you're on PA American Water water.
We quote you on the spot
You get a clear price for your system right then, starting from a base package at a set price.
A free water test tunes your system
Before we install, we test your actual water for free and tune the system to it, so you only pay for the treatment your water needs.
We install your system
We install it cleanly, show you how it works, and let you know when filters and service are due.
PA American Water water: common questions
Is Pennsylvania American Water Coatesville District water safe to drink?
Pennsylvania American Water Coatesville District's 2025 report shows its water met state and federal drinking water standards except where noted in the table above. Meeting the standards doesn't mean nothing is in the water, so many families add filtration for taste, PFAS or hardness.
Does PA American Water use chlorine or chloramine?
Chloramine. Chloramine needs catalytic carbon to filter well.
Is PA American Water water hard?
The report lists About 4.2 grains per gallon on average (2.5–6 gpg, fairly soft).
What about PFAS in PA American Water water?
PFOA and PFOS not detected in the 2025 report. Pennsylvania's limits are 14 ppt for PFOA and 18 ppt for PFOS; EPA's federal limit is 4 ppt for each.
Do you install water treatment for PA American Water customers?
Yes. Willow Springs Water Company serves Chester County homes from Sinking Spring. Request an instant free quote or call (610) 400-3132.
Written by Sam Beiler, co-founder of Willow Springs Water Company, Sinking Spring, PA. Last updated November 2026. Willow Springs is not affiliated with Pennsylvania American Water Coatesville District.