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Knob Vue Estates

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
150 people
Connections
100
Water source
Groundwater
Based in
Durham, PA
County
Beaver
Owner
Private
The ZIP code it serves

15042

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. No health-based violations on file since 2016.

What handles it

What was found

PFAS: Pennsylvania’s own results under its PFAS rule, entry point samples taken from March 26, 2025 to June 26, 2026.

Lead and copper: EPA SDWIS monitoring periods ending 1995 to 2000.

Total trihalomethanes (TTHM), nitrate, haloacetic acids (HAA5), arsenic, chromium (total) and fluoride: Pennsylvania’s own results, samples taken from July 8, 2020 to Sept. 30, 2026, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from Sept. 4, 2013 to July 11, 2019. Newer results are in the utility’s annual water quality report.

PFAS: PFOS and PFOA 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 the health goal3.3 ppt highest, found in 1 of 6 samples. Details
PFOS4.0 pptAbove EPA’s new limit (2029)9.2 ppt highest, found in 1 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

17ppb

90th percentile, 2000

In the latest period, 9 in 10 homes sampled were at or below 17 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

PFOS

Comes from the source

Above EPA’s new limit (2029)

9.2ppt

Highest sample, June 29, 2025; found in 1 of 6

2026: not found

The highest sample was 9.2 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 2.3 ppt, for the year to Dec. 31, 2025: below Pennsylvania’s limit of 18 ppt and below EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, it wasn’t found in any of its two samples.

What handles it

Above the health goal1

PFOA

Comes from the source

Above the health goal

3.3ppt

Highest sample, June 29, 2025; found in 1 of 6

2026: not found

The highest sample was 3.3 ppt: below EPA’s new limit of 4.0 ppt, which takes effect in 2029, but above its health goal of zero. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 0.82 ppt, for the year to Dec. 31, 2025: below Pennsylvania’s limit of 14 ppt and below EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, it wasn’t found in any of its two samples.

What handles it

Below EPA’s limits3

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

17.9ppb

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 17.9 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 18 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

0.74ppm

Highest sample; found in 3 of 7

2026, one sample: 0.74 ppm

The highest sample, in 2026, was 0.74 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its one sample was 0.74 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.31 ppm, in 2015.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

2.3ppb

Highest yearly average, 2021 to 2024

2024: not found

Averaged by year, the highest was 2.3 ppb, in 2021, below EPA’s legal limit of 60 ppb. Its highest single sample was 2.5 ppb. In 2024, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 17 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Fluoride
  • Uranium

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, PFOS Reduction, PFOA Reduction

    For: Lead, PFOS, PFOA

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

  • NSF/ANSI 58

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

    For: Lead, PFOS, PFOA

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

No health-based violations on file with EPA since 2016. There are 69 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), nitrate, haloacetic acids (HAA5), arsenic, chromium (total) and fluoride 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. Knob Vue Estates’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 July 8, 2020 to Sept. 30, 2026; EPA’s compliance samples are from Sept. 4, 2013 to July 11, 2019; Pennsylvania’s PFAS results run from March 26, 2025 to June 26, 2026.

Testing your own tap

Knob Vue Estates’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 Knob Vue Estates serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Allegheny County Health Department Public Health Laboratory

    Warrendale, PA · about 5 miles

    Certified for bacteria

    (412) 578-8070

  • Microbac Laboratories, Inc. Pittsburgh Division

    Warrendale, PA · about 5 miles

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

    (724) 772-0610

  • Eurofins Pittsburgh

    Pittsburgh, PA · about 20 miles

    Certified for bacteria

    (412) 963-7058

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 PA5040028. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Beaver County

All Pennsylvania utilities

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