Place carried: Allentown, PA
ZIP code lookup

ZIP 18105: Allentown, PA Tap Water

ZIP 18105 is in the Allentown, PA area, most likely served by LCA ALLENTOWN DIVISION. A ZIP is a postal boundary, not a service area, so confirm your supplier on your water bill.

What the record shows · PA3390024

Test results for LCA ALLENTOWN DIVISION

Results describe the water system, not a specific tap in ZIP 18105. Each bar marks the listed reference for that substance.

Full system record →
above a listed reference
1
detected, within reference or no limit
9
aesthetic measure
1
tested, not detected
26
Detected · 10 results, farthest from the reference first
  • PFOSPerfluorooctanesulfonic acid (PFOS)
    4.4ng/L
    4.0 ng/L federal MCL (2024)
    Above EPA's 2024 limit (one sample) · EPA UCMR 5 · 2023Evidence
  • NO₃Nitrate
    4.96mg/L
    10 mg/L
    Below the listed reference · Utility CCR · 2025Evidence
  • PbLead (90th percentile)
    7µg/L
    15 µg/L federal action level
    Below the listed reference · EPA SDWIS (Lead & Copper Rule) · 2025Evidence
  • HAA5Haloacetic acids (HAA5)
    23.4ppb
    60 ppb federal MCL
    Below the listed reference · Utility CCR · 2025Evidence
  • TTHMTotal trihalomethanes (TTHM)
    28ppb
    80 ppb federal MCL
    Below the listed reference · Utility CCR · 2025Evidence
  • FFluoride
    0.55mg/L
    4.0 mg/L
    Below the listed reference · Utility CCR · 2025Evidence
  • CuCopper
    0.083mg/L
    1.3 mg/L (action level)
    Below the listed reference · Utility CCR · 2025Evidence
  • PFBSPerfluorobutanesulfonic acid (PFBS)
    3ng/L
    2,000 ng/L EPA health advisory (screening, not a legal limit)
    Below the listed reference · EPA UCMR 5 · 2023Evidence
  • PFHxAPerfluorohexanoic acid (PFHxA)
    6.4ng/L
    400,000 ng/L Michigan EGLE state MCL (strictest US state)
    Below the listed reference · EPA UCMR 5 · 2023Evidence
  • PFPeAPerfluoropentanoic acid (PFPeA)
    7.5ng/L
    No federal or state limit; shown for transparency
    No federal or state limit · EPA UCMR 5 · 2023Evidence
Aesthetic · no federal health limit
CaCO₃Water hardness
15gpg
Very hard on the USGS scale · Utility CCR · 2025Evidence
Tested, not detected
Other contaminants tested
26none detected

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

Show all 26Hide list
  • 11Cl-PF3OUdS
  • 4:2 FTS
  • 6:2 FTS
  • 8:2 FTS
  • 9Cl-PF3ONS
  • ADONA
  • HFPO-DA (GenX)
  • NEtFOSAA
  • NFDHA
  • NMeFOSAA
  • PFBA
  • PFDA
  • PFDoA
  • PFEESA
  • PFHpA
  • PFHpS
  • PFHxS
  • PFMBA
  • PFMPA
  • PFNA
  • PFOA
  • PFPeS
  • PFTA
  • PFTrDA
  • PFUnA
  • Lithium
Next step

Go from this record to a decision.

One result is above its listed reference. Lead mostly enters from building plumbing, which this system-level record can’t see.

Test your own tap

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

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  • 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 → · Compare every kit we list

Questions

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Which water system serves ZIP 18105?

The public system on record for ZIP 18105 (Allentown, PA) is LCA ALLENTOWN DIVISION. A ZIP is a postal boundary, not a service area. Confirm your supplier on your water bill.

Is the water in ZIP 18105 the same as Allentown's?

ZIP 18105 falls within the Allentown, 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 18105?

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.