- EPA's UCMR 5 testing looked for 30 contaminants here and found 10.
- Lithium: found in 2 of 16 samples, average 1.17 µg/L, highest 9.65 µg/L (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFOA (a PFAS): found in 12 of 16 samples, average 6.6 ppt, highest 13 ppt (EPA UCMR 5 testing, Aug 2024–May 2025) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFOS (a PFAS): found in 11 of 16 samples, average 5.4 ppt, highest 11.1 ppt (EPA UCMR 5 testing, Aug 2024–May 2025) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFPeA (a PFAS): found in 10 of 16 samples, average 3.7 ppt, highest 9.3 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFBS (a PFAS): found in 12 of 16 samples, average 3.6 ppt, highest 6.4 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFHxA (a PFAS): found in 10 of 16 samples, average 3.4 ppt, highest 8.1 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFHpA (a PFAS): found in 7 of 16 samples, average 1.6 ppt, highest 5.8 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFBA (a PFAS): found in 3 of 16 samples, average 1.1 ppt, highest 6.8 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFHxS (a PFAS): found in 2 of 16 samples, average 0.50 ppt, highest 3.7 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- PFNA (a PFAS): found in 1 of 16 samples, average 0.30 ppt, highest 5.6 ppt (EPA UCMR 5 testing, Aug 2024–May 2025)
- Lead, 90th percentile: 1.6 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jun 1, 2025–Sep 30, 2025). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink North Wales tap water? What EPA records show
EPA PA1460048 · serves Montgomery County, PA · about 72,496 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
North Wales Water Authority (EPA PA1460048)
EPA data as of October 14, 2026. For North Wales's main utility, North Wales Water Authority: We found no health-based violations in EPA's records for this system (PA1460048) since July 1, 2021, as of October 14, 2026. This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
What EPA records show for North Wales Water Authority, as of October 14, 2026
We found no health-based violations in EPA's records for this system (PA1460048) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for North Wales Water Authority (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 1.6 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jun 1, 2025–Sep 30, 2025). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
EPA's UCMR 5 testing looked for 30 contaminants here and found 10.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does North Wales Water Authority use chloramine?
We didn't find chloramine in North Wales Water Authority's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.