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MT Idy 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
80 people
Connections
40
Water source
Groundwater
Based in
Narvon, PA
County
Chester
Owner
Private
The ZIP code it serves

19335

The short answer

1 result is 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: Lead, above the action level. 8 health-based violations since 2016.

What handles it

What was found

PFAS: Pennsylvania’s own results under its PFAS rule, entry point samples taken from April 7, 2025 to Sept. 21, 2026.

Lead and copper: EPA SDWIS monitoring periods ending 1993 to 2006.

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 2.7 ppm, for the period ending Dec. 31, 1997. None since is on file, so it is not counted as a current finding.

Uranium, haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate, fluoride, chromium (total) and arsenic: Pennsylvania’s own results, samples taken from April 1, 2020 to June 1, 2026, with EPA’s 2012 to 2019 file for earlier years.

PFAS: PFOA, PFHxS and PFBS were found, of the six PFAS in EPA’s 2024 drinking water rule; their results are below.

EPA’s 2024 PFAS rule, compound by compound

PFASEPA’s limitResult
PFOA4.0 pptAbove EPA’s new limit (2029)5.6 ppt highest, found in 5 of 6 samples. Details
PFOS4.0 pptNot foundNot found in any of 6 samples
PFHxS10 pptBelow EPA’s limits2.7 ppt highest, found in 3 of 6 samples. Details
PFNA10 pptNot foundNot found in any of 6 samples
HFPO-DA (GenX)10 pptNot foundNot found in any of 6 samples
PFBSIndex onlyBelow EPA’s limits2.7 ppt highest, found in 4 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 limit1

Lead

Comes from pipes, often your own

Above the action level

32ppb

90th percentile, 2006

In the latest period, 9 in 10 homes sampled were at or below 32 ppb, above EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027, and this result is at or above that. EPA’s health goal for lead is zero.

What handles it

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

PFOA

Comes from the source

Above EPA’s new limit (2029)

5.6ppt

Highest sample, July 7, 2025; found in 5 of 6

2026 average: 3.2 ppt

The highest sample was 5.6 ppt, above 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 5.1 ppt, for the year to June 30, 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 three samples averaged 3.2 ppt.

What handles it

Above the health goal1

Uranium

Comes from the source

Above the health goal

1ppb

Highest yearly average, 2023 to 2026

2026: not found

Averaged by year, the highest was 1 ppb, in 2023: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2026, the latest year on file, it wasn’t found in any of its two samples.

What handles it

Below EPA’s limits7

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

32.2ppb

Highest yearly average, 2021 to 2024

2024, one sample: 11.2 ppb

Averaged by year, the highest was 32.2 ppb, in 2021, below EPA’s legal limit of 60 ppb. In 2024, the latest year on file, its one sample was 11.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 42.8 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

39.5ppb

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 39.5 ppb, in 2024, below EPA’s legal limit of 80 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 54.7 ppb, in 2018.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Nitrate

Comes from the source

Below EPA’s limits

3.6ppm

Highest sample; found in 9 of 9

2026, one sample: 3.5 ppm

The highest sample, in 2025, was 3.6 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 3.5 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.5 ppm, in 2017.

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

2.7ppt

Highest sample, March 2, 2026; found in 3 of 6

2026 average: 0.89 ppt

The highest sample was 2.7 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 1.6 ppt, for the year to March 31, 2026: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, its three samples averaged 0.89 ppt.

What handles it

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.3ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.3 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

1.0ppb

Highest yearly average, 2021 to 2024

2024: not found

Averaged by year, the highest was 1.0 ppb, in 2021, below EPA’s legal limit of 100 ppb. In 2024, the latest year on file, it wasn’t found in its one sample.

What handles it

PFBS

Comes from the source

Below EPA’s limits

2.7ppt

Highest sample, March 2, 2026; found in 4 of 6

2026 average: 0.91 ppt

The highest sample was 2.7 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 three samples averaged 0.91 ppt.

What handles it

4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

From routine monitoring

  • Arsenic

PFAS, from Pennsylvania’s own monitoring

  • HFPO-DA (GenX)
  • PFNA
  • PFOS

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: Lead Reduction, PFOA Reduction

    For: Lead, PFOA

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

  • NSF/ANSI 58

    Claims: Lead Reduction, Perfluorooctanoic Acid (PFOA), Uranium

    For: Lead, PFOA, Uranium

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 lead, ranked

The best water filters for PFAS, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2016 to Dec. 31, 201629.2 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2016 to Dec. 31, 201613.3 PCI/LResolved
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2016 to Sept. 30, 201630.3 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2016 to Sept. 30, 201613.3 PCI/LResolved
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2016 to June 30, 201629.7 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2016 to June 30, 201614 PCI/LResolved
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2016 to March 31, 201641 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2016 to March 31, 201620.6 PCI/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 8 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Uranium, haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate, fluoride, chromium (total) and arsenic results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. MT Idy 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 April 1, 2020 to June 1, 2026; Pennsylvania’s PFAS results run from April 7, 2025 to Sept. 21, 2026.

Testing your own tap

MT Idy 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 MT Idy Mobile Home Park serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Brandywine Science Center

    Kennett Square, PA · about 11 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (610) 444-9850

  • H.O. Thompson Testing Lab

    Parkesburg, PA · about 11 miles

    Certified for bacteria

    (610) 593-5030

  • Aqua Pennsylvania, Inc.

    Bryn Mawr, PA · about 21 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity

    (610) 525-1400

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 PA1150020. Rebuilt from EPA data on Oct. 18, 2026.

Also in Chester County

All Pennsylvania utilities

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