Is West Chester, PA Tap Water Safe to Drink?
West Chester tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 5.47 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where West Chester Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How West Chester Compares
West Chester's water is 28% softer than the national average of 138 PPM - ranking in the bottom 56% for hardness nationwide. Most homes here do not need a softener. Within Pennsylvania, it ranks #16 of 31 cities (3% above the state average of 97 PPM). Among smaller cities, West Chester ranks #135 of 288 for hardness.
What West Chester's Water Means for Your Home
Hardness: 100 PPM - Low Concern
West Chester's water is firmly in the moderate range at 100 PPM. You'll see some spotting on glassware and a film on shower doors over time, but it's not the kind of hardness that demands a full softener. A salt-free conditioner is worth considering if you have a tankless water heater or high-end fixtures.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. West Chester has PFOA at 5.47 ppt, exceeding the EPA's 2024 limit of 4 ppt per compound. PFAS are synthetic compounds that accumulate in your body over time. A certified carbon filter or reverse osmosis system with NSF P473 certification is the most effective protection. See the regulatory timeline.
What's in the Treatment Process
West Chester's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 38.9 ppb (49% of the legal limit, but 259x the EWG guideline) and HAA5 at 24.5 ppb (41% of the legal limit, but 245x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 0.163 ppb, which is 8.2x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 100 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 170 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 23.46 ppt | — | No total limit | Detected |
| ↳ PFOA | 5.47 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 2 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.1 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 4.12 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for West Chester Homes
Recommended Filter for West Chester
PFAS exceed EPA limits (PFOA: 5.47 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
Quick Fix for Chlorine: Shower Filter
At 1.1 mg/L chlorine, many West Chester residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in West Chester
With PFAS at 23.46 ppt in West Chester's supply, confirming your home's specific levels is especially important. PFAS vary by neighborhood and can concentrate differently depending on your position in the distribution system.
Free option: Request Aqua Pennsylvania's annual Consumer Confidence Report for official city-level data.
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About West Chester's Water Supply
Water Utility: Aqua Pennsylvania
Water Source: Chester Creek watershed (Surface Water)
Population Served: 48,600
Hardness: 100 PPM (5.8 grains per gallon)
West Chester's drinking water comes from surface sources — Chester Creek watershed. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 49,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Aqua Pennsylvania's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by Aqua Pennsylvania in West Chester, PA, including ZIP codes:
19017, 19052, 19316, 19319, 19331, 19335, 19340, 19341, 19342, 19343, 19344, 19354, 19371, 19372, 19373, 19376, 19380, 19381, 19382, 19383, 19395, 19397, 19398, 19399, 19421, 19425, 19480
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare West Chester to Other Pennsylvania Cities
Frequently Asked Questions About West Chester Water
Is West Chester tap water safe to drink?
Where does West Chester's water come from?
Do I need a water softener in West Chester?
How do I remove PFAS from West Chester tap water?
What water filter is best for West Chester?
Is West Chester water safe for babies and infants?
What is the hardness of West Chester water in grains per gallon?
What are disinfection byproducts in West Chester's water?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What West Chester Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 100 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on West Chester's water data.