Place carried: Williamsport, PA
ZIP code lookup

ZIP 17701: Williamsport, PA Tap Water

ZIP 17701 is in the Williamsport, PA area, most likely served by WILLIAMSPORT MUN WATER AUTH. A ZIP is a postal boundary, not a service area, so confirm your supplier on your water bill.

What the record shows · PA4410173

Test results for WILLIAMSPORT MUN WATER AUTH

Results describe the water system, not a specific tap in ZIP 17701. Each bar marks the listed reference for that substance.

Full system record →
above a listed reference
1
detected, within reference or no limit
5
aesthetic measures
0
tested, not detected
25
Detected · 6 results, farthest from the reference first
  • PFOSPerfluorooctanesulfonic acid (PFOS)
    5.1ng/L
    4.0 ng/L federal MCL (2024)
    Above limit · EPA UCMR 5 · 2024Evidence
  • PFNAPerfluorononanoic acid (PFNA)
    9.7ng/L
    10 ng/L federal MCL (2024)
    Below the listed reference · EPA UCMR 5 · 2024Evidence
  • PFHxSPerfluorohexanesulfonic acid (PFHxS)
    3.6ng/L
    10 ng/L federal MCL (2024)
    Below the listed reference · EPA UCMR 5 · 2024Evidence
  • PbLead (90th percentile)
    2µg/L
    15 µg/L federal action level
    Below the listed reference · EPA SDWIS (Lead & Copper Rule) · 2025Evidence
  • PFHxAPerfluorohexanoic acid (PFHxA)
    3.5ng/L
    400,000 ng/L Michigan EGLE state MCL (strictest US state)
    Below the listed reference · EPA UCMR 5 · 2024Evidence
  • PFPeAPerfluoropentanoic acid (PFPeA)
    4.1ng/L
    No federal or state limit; shown for transparency
    No federal or state limit · EPA UCMR 5 · 2024Evidence
Aesthetic · no federal health limit
CaCO₃Water hardness

Not measured: no utility report on file. Hardness affects fixtures and appliances, not health.

Tested, not detected
Other contaminants tested
25none detected

Below each lab’s reporting limit. A result, not zero, and it covers only what was tested.

Show all 25Hide list
  • 11Cl-PF3OUdS
  • 4:2 FTS
  • 6:2 FTS
  • 8:2 FTS
  • 9Cl-PF3ONS
  • ADONA
  • HFPO-DA (GenX)
  • NEtFOSAA
  • NFDHA
  • NMeFOSAA
  • PFBA
  • PFBS
  • PFDA
  • PFDoA
  • PFEESA
  • PFHpA
  • PFHpS
  • PFMBA
  • PFMPA
  • PFOA
  • PFPeS
  • PFTA
  • PFTrDA
  • PFUnA
  • Lithium

Test your own tap

Screening tells you if something is worth a closer look; a lab result is the number you can act on.

As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.

  • Screening: quick check, not lab-grade

    Safe Home DIY Lead in Drinking Water Combo Test Kit

    Safe Home (EnviroTestKits)

    Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb

    • Turnaround: 5 minutes

    What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.

  • Lab-certified results

    ETR Labs Basic Water Quality Test Kit

    ETR Laboratories

    50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria

    What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.

When your results arrive, read them here →

Questions

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Which water system serves ZIP 17701?

The public system on record for ZIP 17701 (Williamsport, PA) is WILLIAMSPORT MUN WATER AUTH. A ZIP is a postal boundary, not a service area. Confirm your supplier on your water bill.

Is the water in ZIP 17701 the same as Williamsport's?

ZIP 17701 falls within the Williamsport, PA area, but a ZIP code can span more than one utility. Read the serving system's own record for the results that apply to your address.

How do I find the exact water system for ZIP 17701?

Check the utility name on your water bill, or resolve it from your street address with Find My Water. The ZIP-level view lists candidate systems, not a confirmed household match.