1
At 8.7 GPG, Allentown's water qualifies as moderately hard. This can cause limescale in pipes and shorten appliance lifespan.
2
PFAS have been identified in Allentown's water at 2.2 parts per trillion. A reverse osmosis system is the most reliable home treatment.
3
Chlorine levels may affect the taste of Allentown's tap water. A carbon filter improves flavor.

Score

63 /100

Moderate

"Good" threshold (70)

Allentown tap water is sourced from Little Lehigh Creek and local wells and treated by Allentown Bureau of Water Resources. PFAS forever chemicals have been detected. Water hardness is hard at 8.7 GPG which may cause scale buildup. Overall purity score: 63/100 (Moderate). Updated for 2026.

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Best filters matched to Allentown's 4 issues.

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MATCHED TO ALLENTOWN'S WATER DATA

Best Water Filters for Allentown, PA (2026)

Matched to PFAS Detected, Hard Water (8.7 GPG), Moderate Chlorine in Allentown.

PFAS Detected Hard Water (8.7 GPG) Moderate Chlorine

Best Overall #1 for Allentown

Clearly Filtered Water Pitcher

Pitcher Filter

$80-95

Why this fits Allentown

Removes 99%+ of PFAS detected in Allentown's water
Eliminates chlorine taste and odor from Allentown's water
NSF/ANSI 42 + NSF/ANSI 53 + NSF/ANSI 401 certified

Pros & Cons +

No installation fill and pour

Removes 365+ contaminants including PFAS

Small capacity 2-3 people

Filter replacements every 4 months

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Best for PFAS

Waterdrop G3P800 Tankless RO

Tankless Reverse Osmosis

$380-450

Why this fits Allentown

Removes 99%+ of PFAS detected in Allentown's water
Eliminates chlorine taste and odor from Allentown's water
NSF/ANSI 58 + NSF 372 certified

Pros & Cons +

No tank saves cabinet space

800 GPD fast flow rate

Higher upfront cost

Filter replacements are proprietary

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Best for Taste

APEC Water Systems ROES-50

Under-Sink Reverse Osmosis

$195-220

Why this fits Allentown

Removes 99%+ of PFAS detected in Allentown's water
Eliminates chlorine taste and odor from Allentown's water
NSF/ANSI 58 certified

Pros & Cons +

5-stage filtration removes 99%+ of contaminants

Long-lasting filters (6-12 month replacement)

Requires under-sink installation

Wastes some water during filtration

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Best Value

Waterdrop 10UA Under-Sink Filter

Under-Sink Carbon Filter

$40-60

Why this fits Allentown

Eliminates chlorine taste and odor from Allentown's water
NSF/ANSI 42 certified
Budget-friendly at $40-60

Pros & Cons +

Very affordable

Easy DIY install no plumber

Does not remove PFAS or hardness

Single point of use only

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As an Amazon Associate, PurityMap may earn from qualifying purchases. Based on latest Allentown water data.

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Allentown Water FAQ

Is Allentown PA tap water safe to drink in 2026?

Allentown tap water meets EPA federal drinking water standards and scores 63/100 (Moderate) on PurityMap for 2026. PFAS forever chemicals have been detected at 2.2 ppt. An NSF-certified filter is strongly recommended. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.

Does Allentown PA use chlorine or chloramine for disinfection?

Allentown uses chloramine as the primary disinfectant with a residual level of 1.8 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.

How hard is Allentown PA water and what is the TDS level?

Allentown water hardness is 8.7 grains per gallon (hard) with a TDS of 310 ppm (poor). This level causes noticeable scale buildup in water heaters kettles and dishwashers. A water softener is recommended to protect plumbing and reduce soap usage.

Has PFAS been found in Allentown PA drinking water?

Yes. PFAS forever chemicals have been detected in Allentown water at approximately 2.2 ppt according to EPA UCMR5 monitoring data. A reverse osmosis or NSF P473-certified filter is the most effective residential solution.

What is the best water filter for Allentown?

Based on Allentown's water profile, we recommend the Clearly Filtered Water Pitcher. Allentown: PFAS detected or elevated lead risk. Reverse osmosis is the only residential technology proven to reduce both below detection limits. TDS will also drop significantly.

Nearby Reports

PittsburghPennsylvania — 58/100 PhiladelphiaPennsylvania — 67/100 EriePennsylvania — 82/100 ReadingPennsylvania — 82/100 ScrantonPennsylvania — 82/100 BethlehemPennsylvania — 82/100

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Data Sources

EPA SDWIS
EWG Tap Water Database
Allentown Bureau of Water Resources CCR
USGS monitoring data

PurityMap compiles public data. Updated March 2026.

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