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Loyalsock Mobile Home Park

What EPA’s and Pennsylvania’s records show in this utility’s water: PFAS; nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
85 people
Connections
33
Water source
Groundwater
Based in
South Williamsport, PA
County
Lycoming
Owner
Private
The ZIP code it serves

17754

The short answer

2 results are above EPA’s legal limit, 1 more is above EPA’s new limit, which takes effect in 2029, and 1 more is above the health goal. The worst: PFOS, above Pennsylvania’s limit. 1 health-based violation since 2016.

What handles it

What was found

PFAS: Pennsylvania’s own results under its PFAS rule, entry point samples taken from March 11, 2025 to June 4, 2026.

Lead and copper: EPA SDWIS monitoring periods ending 1995 to 2021.

Nitrate, fluoride, arsenic, chromium (total), haloacetic acids (HAA5), total trihalomethanes (TTHM) and uranium: Pennsylvania’s own results, samples taken from March 9, 2020 to March 10, 2026, with EPA’s 2012 to 2019 file for earlier years.

PFAS: PFOS, PFOA, PFHxS, PFNA and PFBS were found, of the six PFAS in EPA’s 2024 drinking water rule; their results are below. Two other PFAS with no federal limit were found, the highest PFHxA at 8.5 ppt: see them below.

EPA’s 2024 PFAS rule, compound by compound

PFASEPA’s limitResult
PFOA4.0 pptAbove EPA’s new limit (2029)14 ppt highest, found in 6 of 6 samples. Details
PFOS4.0 pptAbove Pennsylvania’s limit24 ppt highest, found in 6 of 6 samples. Details
PFHxS10 pptBelow EPA’s limits2.5 ppt highest, found in 4 of 6 samples. Details
PFNA10 pptBelow EPA’s limits2.1 ppt highest, found in 1 of 6 samples. Details
HFPO-DA (GenX)10 pptNot foundNot found in any of 6 samples
PFBSIndex onlyBelow EPA’s limits8.0 ppt highest, found in 6 of 6 samples. Details
Results from Pennsylvania’s own PFAS monitoring, samples where water enters the pipes; each compound’s card has its four-quarter averages, the way limits are judged. The limits are EPA’s 2024 rule, with compliance due from 2029; EPA has since proposed changes to some of them, explained on each compound’s page. Pennsylvania’s own limits for PFOA and PFOS are in force now. PFBS has no limit of its own and counts only toward EPA’s Hazard Index, which TapBuff works out only from UCMR 5’s averages, so it isn’t given here.

About PFAS certifications

NSF’s PFAS claims are tested to below 20 ppt. EPA’s limit is 4.0 ppt, and EPA says no certification yet shows a filter reaching its levels.

Above the legal limit2

PFOS

Comes from the source

Above Pennsylvania’s limit

24ppt

Highest sample, June 12, 2025; found in 6 of 6

2026 average: 20.5 ppt

The highest sample was 24 ppt, about 6 times EPA’s new limit of 4.0 ppt, which takes effect in 2029. EPA’s health goal is zero. Compliance will be judged on a running annual average, not one sample. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 20.5 ppt, for the year to March 31, 2026: above Pennsylvania’s limit of 18 ppt and above EPA’s new limit of 4.0 ppt. Pennsylvania recorded three violations of its limit for PFOS here, dated Jan. 21, 2026, April 21, 2026 and July 21, 2026, on running averages of 19 to 21 ppt. In 2026, the latest year on file, its two samples averaged 20.5 ppt.

What handles it

Copper

Comes from pipes, often your own

Above the action level

2.2ppm

90th percentile, 2021

In the latest period, 9 in 10 homes sampled were at or below 2.2 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Above EPA’s new limit, which takes effect in 20291

PFOA

Comes from the source

Above EPA’s new limit (2029)

14ppt

Highest sample, March 10, 2026; found in 6 of 6

2026 average: 12.5 ppt

The highest sample was 14 ppt, about 3.5 times EPA’s new limit of 4.0 ppt, which takes effect in 2029. EPA’s health goal is zero. Compliance will be judged on a running annual average, not one sample. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 10.6 ppt, for the year to March 31, 2026: below Pennsylvania’s limit of 14 ppt and above EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, its two samples averaged 12.5 ppt.

What handles it

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

1.0ppb

90th percentile, 2003

In the latest period, 9 in 10 homes sampled were at or below 1.0 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

5.0ppm

Highest sample; found in 23 of 23

2026, one sample: 4.5 ppm

The highest sample, in 2024, was 5.0 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 4.5 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 6.2 ppm, in 2015.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

PFHxS

Comes from the source

Below EPA’s limits

2.5ppt

Highest sample, June 4, 2026; found in 4 of 6

2026 average: 2.5 ppt

The highest sample was 2.5 ppt, below EPA’s new limit of 10 ppt, which takes effect in 2029. Averaged over four quarters at one entry point, the way EPA’s limit is judged, the highest was 1.2 ppt, for the year to June 30, 2026: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, its two samples averaged 2.5 ppt.

What handles it

PFNA

Comes from the source

Below EPA’s limits

2.1ppt

Highest sample, March 10, 2026; found in 1 of 6

2026 average: 1.1 ppt

The highest sample was 2.1 ppt, below EPA’s new limit of 10 ppt, which takes effect in 2029. Averaged over four quarters at one entry point, the way EPA’s limit is judged, the highest was 0.53 ppt, for the year to March 31, 2026: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, its two samples averaged 1.1 ppt.

What handles it

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.072ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.072 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.2 ppm, in 2012.

What handles it

PFBS

Comes from the source

Below EPA’s limits

8.0ppt

Highest sample, March 10, 2026; found in 6 of 6

2026 average: 7.9 ppt

The highest sample was 8.0 ppt, below EPA’s hazard index benchmark of 2,000 ppt. PFBS has no legal limit or health goal of its own. In 2026, the latest year on file, its two samples averaged 7.9 ppt.

What handles it

Also found, with no federal limit

EPA measured these PFAS to learn how often they occur. None has a legal limit or a health goal yet.

CompoundHighest sampleFound inCertification claim
PFHxA8.5 ppt6 of 6None covers it
PFHpA4.5 ppt6 of 6NSF/ANSI 53: Total PFAS Reduction
16 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

From routine monitoring

  • Arsenic
  • Chromium (total)
  • Haloacetic acids (HAA5)
  • Total trihalomethanes (TTHM)
  • Uranium

PFAS, from Pennsylvania’s own monitoring

  • 11Cl-PF3OUdS
  • 9Cl-PF3ONS
  • ADONA
  • HFPO-DA (GenX)
  • NEtFOSAA
  • NMeFOSAA
  • PFDA
  • PFDoA
  • PFTA
  • PFTrDA
  • PFUnA

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

  • NSF/ANSI 53

    Claims: PFOS Reduction, Copper Reduction, PFOA Reduction, Lead Reduction

    For: PFOS, Copper, PFOA, Lead

    Other certifiers’ wording: Total PFAS Reduction; Perfluorooctane Sulfonate (PFOS); Perfluorooctanoic Acid (PFOA)

  • NSF/ANSI 58

    Claims: Perfluorooctane Sulfonate (PFOS), Copper Reduction, Perfluorooctanoic Acid (PFOA), Lead Reduction

    For: PFOS, Copper, PFOA, Lead

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best water filters for PFAS, ranked

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Groundwater RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)June 1, 2023 to June 30, 2023—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 38 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate, fluoride, arsenic, chromium (total), haloacetic acids (HAA5), total trihalomethanes (TTHM) and uranium results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. Loyalsock Mobile Home Park’s own annual report, which it must send you every year, has the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Pennsylvania’s results run from March 9, 2020 to March 10, 2026; Pennsylvania’s PFAS results run from March 11, 2025 to June 4, 2026.

Testing your own tap

Loyalsock Mobile Home Park’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Pennsylvania certifies.

The 3 labs Pennsylvania certifies closest to the area Loyalsock Mobile Home Park serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Pace Analytical Services LLC - Williamsport, PA

    Williamsport, PA · about 3 miles

    (570) 326-4001

  • Pace Analytical Services, LLC - Wysox

    Wysox, PA · about 43 miles

    Certified for bacteria

    (570) 866-0195

  • LEAP Testing Service

    Sayre, PA · about 49 miles

    Certified for bacteria, nitrate

    (570) 887-4645

Penn State Agricultural Analytical Services Laboratory: Drinking water test kits from many county Extension offices, mailed back to the lab overnight with payment. Packages cover bacteria and basic chemistry, with add-ons for nitrate, metals, lead, and mining or gas drilling concerns. The standard package of bacteria, pH and total dissolved solids is $60, or $70 with nitrate; bacteria alone is $40, nitrate $15 and lead $25. Drinking Water Testing, Penn State Agricultural Analytical Services Lab.

All 108 certified labs for Pennsylvania

Sources

PWSID PA4410025. Rebuilt from EPA data on Oct. 18, 2026.

Also in Lycoming County

All Pennsylvania utilities

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