O Yes Apts
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
- 35 people
- Connections
- 5
- Water source
- Groundwater
- Based in
- Lancaster, PA
- County
- Lebanon
- Owner
- Private
The ZIP code it serves
The short answer
Nothing in EPA’s and Pennsylvania’s records for this utility is above a health goal. That covers PFAS; nitrate, arsenic and other regulated chemicals; and lead and copper, not everything. 7 health-based violations since 2016.
What was found
PFAS: Pennsylvania’s own results under its PFAS rule, entry point samples taken from Feb. 4, 2025 to Oct. 6, 2025.
Nitrate, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, arsenic, chromium (total) and uranium: Pennsylvania’s own results, samples taken from March 3, 2020 to April 16, 2026.
PFAS: None of the six PFAS in EPA’s 2024 drinking water rule was found in this utility’s samples.
EPA’s 2024 PFAS rule, compound by compound
| PFAS | EPA’s limit | Result |
|---|---|---|
| PFOA | 4.0 ppt | Not foundNot found in any of 4 samples |
| PFOS | 4.0 ppt | Not foundNot found in any of 4 samples |
| PFHxS | 10 ppt | Not foundNot found in any of 4 samples |
| PFNA | 10 ppt | Not foundNot found in any of 4 samples |
| HFPO-DA (GenX) | 10 ppt | Not foundNot found in any of 4 samples |
| PFBS | Index only | Not foundNot found in any of 4 samples |
| 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. | ||
Below EPA’s limits4
Nitrate
Comes from the source
2.4ppm
Highest sample; found in 1 of 7
2026, one sample: 2.4 ppm
The highest sample, in 2026, was 2.4 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its one sample was 2.4 ppm.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
Total trihalomethanes (TTHM)
Forms or is added in treatment
13.6ppb
Highest yearly average, 2022 to 2025
2025, one sample: 12.8 ppb
Averaged by year, the highest was 13.6 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 12.8 ppb.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
Haloacetic acids (HAA5)
Forms or is added in treatment
6.1ppb
Highest yearly average, 2022 to 2025
2025, one sample: 5.3 ppb
Averaged by year, the highest was 6.1 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, its one sample was 5.3 ppb.
What handles it
No certification claim covers this compound yet.
Fluoride
Forms or is added in treatment
0.4ppm
Highest yearly average, 2021 to 2024
Averaged by year, the highest was 0.4 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
10 compounds tested and not foundIncluding all six PFAS in EPA’s 2024 rule. Below the reporting level in every sample. Not found is not the same as zero.
From routine monitoring
- Arsenic
- Chromium (total)
- Lead
- Uranium
PFAS, from Pennsylvania’s own monitoring
- HFPO-DA (GenX)
- PFBS
- PFHxS
- PFNA
- PFOA
- PFOS
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | May 1, 2025 to May 31, 2025 | — | Resolved |
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | March 1, 2021 to March 31, 2021 | — | Resolved |
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | Jan. 1, 2020 to Jan. 31, 2020 | — | Resolved |
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | Dec. 1, 2019 to Dec. 31, 2019 | — | Resolved |
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | Aug. 1, 2017 to Aug. 31, 2017 | — | Resolved |
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | April 1, 2017 to April 30, 2017 | — | Resolved |
| Groundwater Rule | Required treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR) | Aug. 1, 2016 to Aug. 31, 2016 | — | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 22 monitoring or reporting violations not shown. | ||||
What this report can’t tell you
Everything else. Nitrate, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, arsenic, chromium (total) and uranium results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. O Yes Apts’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 3, 2020 to April 16, 2026; Pennsylvania’s PFAS results run from Feb. 4, 2025 to Oct. 6, 2025.
Testing your own tap
The 3 labs Pennsylvania certifies closest to the area O Yes Apts serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Microbac Laboratories, Inc. - Harrisburg
Harrisburg, PA · about 11 miles
H2O Environmental LLC
Harrisburg, PA · about 13 miles
Certified for bacteria
Pure-Test Laboratory
Myerstown, PA · about 14 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
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 PennsylvaniaSources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- Pennsylvania Department of Environmental Protection, Drinking Water Reporting System, PFAS results read Oct. 17, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- Pennsylvania Department of Environmental Protection, Drinking Water Reporting System, results from Jan. 2, 2020 to Oct. 8, 2026, read Oct. 17, 2026
- Certified labs: Pennsylvania DEP Laboratory Accreditation Program, accredited labs for drinking water, read Oct. 11, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID PA7380051. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s and Pennsylvania’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportO Yes Apts must send you a water quality report every year. It covers contaminants this page does not show.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded