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Maplewood 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
70 people
Connections
31
Water source
Groundwater
Based in
Bowmansville, PA
County
Chester
Owner
Private
Hardness
Moderately hard
The ZIP code it serves

19320

The short answer

1 result is above EPA’s legal limit, and 2 more are above EPA’s new limit, which takes effect in 2029. The worst: Lead, above the action level. 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 17, 2025 to Aug. 25, 2026.

Lead and copper: EPA SDWIS monitoring periods ending 1994 to 2013.

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 6.8 ppm, for the period ending June 30, 1994. None since is on file, so it is not counted as a current finding.

Nitrate, total trihalomethanes (TTHM), arsenic, chromium (total), fluoride and haloacetic acids (HAA5): Pennsylvania’s own results, samples taken from Feb. 28, 2020 to Aug. 25, 2026, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from March 13, 2014 to July 18, 2017. Newer results are in the utility’s annual water quality report.

PFAS: PFOA, PFOS, 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 24 ppt: see them below.

EPA’s 2024 PFAS rule, compound by compound

PFASEPA’s limitResult
PFOA4.0 pptAbove EPA’s new limit (2029)14.2 ppt highest, found in 7 of 7 samples. Details
PFOS4.0 pptAbove EPA’s new limit (2029)9.3 ppt highest, found in 6 of 7 samples. Details
PFHxS10 pptBelow EPA’s limits5.7 ppt highest, found in 7 of 7 samples. Details
PFNA10 pptBelow EPA’s limits1.9 ppt highest, found in 3 of 7 samples. Details
HFPO-DA (GenX)10 pptNot foundNot found in any of 7 samples
PFBSIndex onlyBelow EPA’s limits54 ppt highest, found in 7 of 7 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

45ppb

90th percentile, 2013

In the latest period, 9 in 10 homes sampled were at or below 45 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 20292

PFOA

Comes from the source

Above EPA’s new limit (2029)

14.2ppt

Highest sample, Aug. 25, 2026; found in 7 of 7

2026 average: 13.3 ppt

The highest sample was 14.2 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 10.8 ppt, for the year to Sept. 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 13.3 ppt.

What handles it

PFOS

Comes from the source

Above EPA’s new limit (2029)

9.3ppt

Highest sample, March 16, 2026; found in 6 of 7

2026 average: 8.8 ppt

The highest sample was 9.3 ppt, about 2.3 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 6.9 ppt, for the year to June 30, 2026: below Pennsylvania’s limit of 18 ppt and above EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, its three samples averaged 8.8 ppt.

What handles it

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

9.9ppm

Highest sample; found in 27 of 27

2026 average: 7.3 ppm

The highest sample, in 2023, was 9.9 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its three samples averaged 7.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 7.4 ppm, in 2012.

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

5.7ppt

Highest sample, Aug. 25, 2026; found in 7 of 7

2026 average: 5.0 ppt

The highest sample was 5.7 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 4.0 ppt, for the year to Sept. 30, 2026: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, its three samples averaged 5.0 ppt.

What handles it

PFNA

Comes from the source

Below EPA’s limits

1.9ppt

Highest sample, March 17, 2025; found in 3 of 7

2026: not found

The highest sample was 1.9 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 1.1 ppt, for the year to Dec. 31, 2025: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, it wasn’t found in any of its three samples.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

2.5ppb

Highest yearly average, 2022 to 2025

2025, one sample: 1.9 ppb

Averaged by year, the highest was 2.5 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 1.9 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.3 ppb, in 2016.

What handles it

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

PFBS

Comes from the source

Below EPA’s limits

54ppt

Highest sample, Dec. 17, 2025; found in 7 of 7

2026 average: 9.4 ppt

The highest sample was 54 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 9.4 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
PFHxA24 ppt3 of 3None covers it
PFHpA6.3 ppt3 of 3NSF/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)
  • Fluoride
  • Haloacetic acids (HAA5)
  • 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: Lead Reduction, PFOA Reduction, PFOS Reduction

    For: Lead, PFOA, PFOS

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

  • NSF/ANSI 58

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

    For: Lead, PFOA, PFOS

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

Hardness

Moderately hard, typically 108 mg/L (6.3 grains per gallon), across 2 sampling points, 2022 to 2024.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 6.3 grains per gallon, salt includedSoftener or salt-free conditioner?Pennsylvania water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Groundwater RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Feb. 1, 2020 to Feb. 29, 2020—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 24 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate, total trihalomethanes (TTHM), arsenic, chromium (total), fluoride and haloacetic acids (HAA5) results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Maplewood Mobile Home Park’s own annual report, which it must send you every year, has newer results for those and 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 Feb. 28, 2020 to Aug. 25, 2026; EPA’s compliance samples are from March 13, 2014 to July 18, 2017; Pennsylvania’s PFAS results run from March 17, 2025 to Aug. 25, 2026.

Testing your own tap

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

  • H.O. Thompson Testing Lab

    Parkesburg, PA · about 5 miles

    Certified for bacteria

    (610) 593-5030

  • Brandywine Science Center

    Kennett Square, PA · about 9 miles

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

    (610) 444-9850

  • Batta Laboratories LLC

    Newark, DE · about 21 miles

    Certified for asbestos

    (302) 737-3376

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 PA1150017. Rebuilt from EPA data on Oct. 18, 2026.

Also in Chester County

All Pennsylvania utilities

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