North Middleton Water Authority water quality
North Middleton, PA · serves 8,455 people (3,848 connections) · Surface water · Local government · EPA ID PA7210049
Data: U.S. EPA · How we read the data · How we check it
Buys water from Middlesex Township Municipal Authority, South Middleton Township Water Authority, Carlisle Water Treatment Plant. Treated water bought from another system can carry that system's contaminants.
Summary
PFAS above the 2024 federal limits. Systems have until 2029 to meet the PFAS limits.
Is it an emergency? No: PFAS limits are about years of exposure, not a glass of water, and nothing in EPA's data calls for you to stop drinking the water today. If your utility ever issues a boil-water or do-not-drink notice, follow it.
- PFAS
- Above limitPFOS above the federal limit in EPA's 2023–2025 testing (PFOS 11.2 ppt vs a limit of 4 ppt, where ppt = parts per trillion).
- Lead
- Below action level2 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Sep 2025. Your home's pipes can make yours higher.
- Violations
- Resolved5 health-based violations since 2016, most recently Oct 2017.
- Pregnant, or mixing baby formula with tap water? Babies drink more water for their size, so PFAS exposure matters more for them. Consider bottled water or a filter certified for PFAS for formula, and ask your doctor. Health effects.
- To lower your PFAS exposure now, a home filter certified for PFAS reduction works (reverse osmosis, or activated carbon certified to NSF/ANSI 53 or 58). Filters for these results.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read North Middleton Water Authority's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (717) 243-8269. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 2 entry points tested Mar 2025 to Dec 2025. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA One sample above limit Limit 4 ppt | 3.52 ppt 88% of the limit |
| PFOS Above limit Limit 4 ppt | 11.2 ppt 2.81× the limit |
| PFHxS Detected, below limit Limit 10 ppt | 0.88 ppt 9% of the limit |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Detected, below limit Limit 1 | 0.089 |
| PFBS Detected, below limit Guideline 2,000 ppt | 3.95 ppt |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Detected, below limit Guideline 3,000 ppt | 2.82 ppt |
| PFPeA Detected, no limit | 2.6 ppt |
Pennsylvania has its own PFAS limits. PFOA 14 ppt (this system's highest average: 3.52 ppt), PFOS 18 ppt (this system's highest average: 11.2 ppt). State compliance is judged on the state's own sampling, so ask the utility or the state program whether it meets them.
For context: the PFOS average is higher than at 94% of the Pennsylvania systems EPA tested.
29 PFAS tested, 6 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 6 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 2 ppb lead (Jun 2025 – Sep 2025). Below action level
Highest since 2016: 9 ppb (Sep 2016).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jun 2025 – Sep 2025 | 2 ppb |
| Jun 2022 – Sep 2022 | 8 ppb |
| Jun 2019 – Sep 2019 | 2 ppb |
Earlier results (9)
| Jun 2016 – Sep 2016 | 9 ppb |
| Jun 2013 – Sep 2013 | 2.28 ppb |
| Jan 2010 – Dec 2010 | 4.4 ppb |
| Jan 2007 – Dec 2007 | 2.5 ppb |
| Jan 2004 – Dec 2004 | 2.4 ppb |
| Jan 2001 – Dec 2001 | 5 ppb |
| Jan 1998 – Dec 1998 | 5 ppb |
| Jan 1995 – Jun 1995 | 3 ppb |
| Jan 1993 – Jun 1993 | 14 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
| When | What happened |
|---|---|
| Oct 2017 | A required step to remove or kill germs (filtration, disinfection or fixing a contaminated well) was not done properly. EPA record: Surface Water Treatment Rule · Treatment Technique (SWTR and GWR) (limit ) Resolved |
| Jan 2016 – Oct 2016 4 times | The system did not remove enough organic matter, which reacts with chlorine to form disinfection byproducts. EPA record: Carbon, total · Treatment Technique Precursor Removal (limit TT ) Resolved |
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Where it serves
North Middleton
ZIP codes the system reported serving: 17013
Nearby utilities
- Carlisle Water Treatment Plant North Middleton · same area · PFAS above limit
- Pennsylvania American Water – West Dickinson · 11 mi · PFAS above limit
- Dillsburg Area Authority Franklin · 14 mi · PFAS above limit
- Capital Region Water Harrisburg · 17 mi
- Veolia Mechanicsburg Fairview · 20 mi · PFAS above limit
- Veolia Newberry System Newberry · 24 mi · PFAS above limit
Questions
Is North Middleton Water Authority water safe to drink?
North Middleton Water Authority had 5 health-based violations since 2016, all since resolved. EPA testing found PFAS above the 2024 federal limits, which systems must meet by 2029. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does North Middleton Water Authority water have PFAS?
Yes. EPA's 2023–2025 testing of North Middleton Water Authority found 6 PFAS at least once. The highest entry-point averages were above the federal limit for PFOS: PFOS 11.2 ppt (limit 4 ppt for PFOA and PFOS, 10 ppt for the others).
What is the lead level in North Middleton Water Authority water?
The most recent 90th-percentile lead result for North Middleton Water Authority is 2 ppb, for the period ending Sep 2025. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for PA7210049: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID PA7210049).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask North Middleton Water Authority at (717) 243-8269, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.