We read 18 results from Lca Allentown Division’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 118,000 people · Water system ID PA3390024 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Lead90th percentile of 50 homes tested, 2 over the action level · Customer taps (50 sites) · 2025 report, page 9 | 7 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal35x the health goal |
| PFOA (a PFAS)highest running annual average · range 2.29 to 6.08 · Entry point · 2025 report, page 8 | 6.08 ppt | 0.007 ppt | 14 ppt (Pennsylvania) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20291.5x the 4 ppt federal limit that takes effect in 2029; below the 14 ppt Pennsylvania limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| PFOS (a PFAS)highest running annual average · range ND to 6.87 · Entry point · 2025 report, page 8 | 6.46 ppt | 1 ppt | 18 ppt (Pennsylvania) now; 4 ppt from 2029 | Above the federal limit that takes effect in 20291.6x the 4 ppt federal limit that takes effect in 2029; below the 18 ppt Pennsylvania limitNot a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Tetrachloroethylene (PCE)highest measured · Entry point · 2025 report, page 8 | 2.9 ppb | 0.06 ppb | 5 ppb | Above the health goal48x the health goal |
| Bariumhighest measured · range 0.04 to 0.05 · Entry point · 2025 report, page 7 | 0.05 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest measured · range 0.7 to 0.91 · Distribution system · 2025 report, page 7 | 0.91 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range ND to 1 · Entry point · 2025 report, page 7 | 1 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of 50 homes tested, 0 over the action level · Customer taps (50 sites) · 2025 report, page 9 | 0.08 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 47.1 · Distribution system · 2025 report, page 7 | 23.4 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 6.8 to 34.6 · Distribution system · 2025 report, page 7 | 28 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.24 to 0.55 · Entry point · 2025 report, page 7 | 0.55 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 2.84 to 4.96 · Entry point · 2025 report, page 8 | 4.96 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 3.88 · Entry point · 2025 report, page 10 | 0.77 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Seleniumhighest measured · range ND to 2 · Entry point · 2025 report, page 8 | 2 ppb | 30 ppb | 50 ppb | Below the health goal |
| Total dissolved solidsaverage · range 392 to 433 · Entry point · 2025 report, page 12 | 413 ppm | — | 500 ppm guideline | Within the guideline |
| Turbidity (cloudiness)highest measured · Allentown treatment plant · 2025 report, page 10 | 0.1 NTU | None set | 1 NTU | Below the legal limit |
| PFBS (a PFAS)average · range ND to 4.44 · Entry point · 2025 report, page 10 | 2.63 ppt | None set | None | No health limit |
| Sodiumaverage · range 37.5 to 53.1 · Entry point · 2025 report, page 12 | 50.8 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Lca Allentown Division’s water between Feb 2023 and Nov 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOS4.4 pptFound in 1 of 8 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS3 pptFound in 1 of 8 samples · highest resultNo federal limit in force for this one
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOS (EPA testing)
What removes it: Reverse osmosis.
Industrial chemicals and pesticides
Found: Tetrachloroethylene (PCE)
What removes it: Carbon block or RO.
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