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Londonderry Court MHP

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

Serves
160 people
Connections
55
Water source
Surface water bought from another system
Based in
North East, PA
County
Chester
Owner
Private
The ZIP code it serves

19330

The short answer

1 result is above EPA’s legal limit. The worst: Lead, above the action level. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 1993 to 2004.

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Pennsylvania’s own results, samples taken from March 13, 2020 to Sept. 9, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Lead

Comes from pipes, often your own

Above the action level

30ppb

90th percentile, 2004

In the latest period, 9 in 10 homes sampled were at or below 30 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

Below EPA’s limits2

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

50.1ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 50.1 ppb, in 2026, below EPA’s legal limit of 60 ppb. Its highest single sample was 71.6 ppb. That was also the latest year on file. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 43.5 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

57.2ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 57.2 ppb, in 2026, below EPA’s legal limit of 80 ppb. Its highest single sample was 78.6 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 69 ppb, in 2016.

What handles it

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

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.”

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

Violations since 2016

No health-based violations on file with EPA since 2016. There are 29 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. Londonderry Court MHP’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 13, 2020 to Sept. 9, 2026.

Testing your own tap

Londonderry Court MHP’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 Londonderry Court MHP 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 7 miles

    Certified for bacteria

    (610) 593-5030

  • Brandywine Science Center

    Kennett Square, PA · about 11 miles

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

    (610) 444-9850

  • Batta Laboratories LLC

    Newark, DE · about 17 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 PA1150019. Rebuilt from EPA data on Oct. 18, 2026.

Also in Chester County

All Pennsylvania utilities

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