Is Philadelphia, PA Tap Water Safe to Drink?
Philadelphia tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 6.93 ppt, PFOS: 4.98 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Philadelphia Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Philadelphia Compares
Philadelphia'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 #15 of 31 cities (3% above the state average of 97 PPM). Among major US cities (500k+), Philadelphia ranks #63 of 100 for hardness.
What Philadelphia's Water Means for Your Home
Hardness: 100 PPM - Low Concern
Philadelphia'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. Philadelphia has PFOA at 6.93 ppt and PFOS at 4.98 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
Philadelphia's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 42.3 ppb (53% of the legal limit, but 282x the EWG guideline) and HAA5 at 34.7 ppb (58% of the legal limit, but 347x 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 0.388 ppb, which is 19x 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) | 45.03 ppt | — | No total limit | Detected |
| ↳ PFOA | 6.93 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 4.98 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 5.8 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ⚠ Elevated |
| Chlorine / Chloramine | 1.5 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 2.16 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Philadelphia Homes
Recommended Filter for Philadelphia
PFAS exceed EPA limits (PFOA: 6.93 ppt, PFOS: 4.98 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
See all filter recommendations for PhiladelphiaQuick Fix for Chlorine: Shower Filter
At 1.5 mg/L chlorine, many Philadelphia 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 Philadelphia
With PFAS at 45.03 ppt in Philadelphia'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 Philadelphia Water's annual Consumer Confidence Report for official city-level data.
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About Philadelphia's Water Supply
Water Utility: Philadelphia Water
Water Source: Delaware + Schuylkill Rivers (Surface Water)
Population Served: 1,600,000
Hardness: 100 PPM (5.8 grains per gallon)
Philadelphia's drinking water comes from surface sources — Delaware + Schuylkill Rivers. 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 1.6 million residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Philadelphia Water'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 Philadelphia Water in Philadelphia, PA, including ZIP codes:
08002, 08003, 08007, 08012, 08021, 08026, 08029, 08030, 08031, 08032, 08033, 08034, 08035, 08043, 08045, 08049, 08052, 08057, 08059, 08065, 08076, 08077, 08078, 08083, 08084, 08093, 08096, 08099, 08101, 08102, 08103, 08104, 08105, 08106, 08107, 08108, 08109, 08110, 19012, 19019, 19092, 19093, 19099, 19101, 19102, 19103, 19104, 19105, 19106, 19107, 19108, 19109, 19110, 19111, 19112, 19113, 19114, 19115, 19116, 19118, 19119, 19120, 19121, 19122, 19123, 19124, 19125, 19126, 19127, 19128, 19129, 19130, 19131, 19132, 19133, 19134, 19135, 19136, 19137, 19138, 19139, 19140, 19141, 19142, 19143, 19144, 19145, 19146, 19147, 19148, 19149, 19150, 19151, 19152, 19153, 19154, 19155, 19160, 19161, 19162, 19170, 19171, 19172, 19173, 19175, 19176, 19177, 19178, 19179, 19181, 19182, 19183, 19184, 19185, 19187, 19188, 19190, 19191, 19192, 19193, 19194, 19195, 19196, 19197, 19244, 19255
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Philadelphia to Other Pennsylvania Cities
Frequently Asked Questions About Philadelphia Water
Is Philadelphia tap water safe to drink?
Where does Philadelphia's water come from?
Do I need a water softener in Philadelphia?
How do I remove PFAS from Philadelphia tap water?
What water filter is best for Philadelphia?
Is Philadelphia water safe for babies and infants?
What is the hardness of Philadelphia water in grains per gallon?
What are disinfection byproducts in Philadelphia'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 Philadelphia 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 Philadelphia's water data.