Is Lewiston, ME tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data for Lewiston Water & Sewer Division.
2 public water systems serve parts of Lewiston. The largest, Lewiston Water & Sewer Division, serves 23,720 people. Your water bill names your system.
Largest system
Lewiston Water & Sewer Division
23,720 people · Surface water · EPA ID ME0090830
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.
Lead: 1.7 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0
Across Maine, 2 of 39 water systems EPA tested had PFAS above a 2024 federal limit, and 1 system were above the lead action level in results from the last five years. Maine results.
Lewiston homes and lead pipes
Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.
Housing: Census American Community Survey 2020–2024 5-year estimates for Lewiston city (tables B25034, B25003). Estimates for small places have a margin of error.
Other water systems serving Lewiston
- Sunset Gardens Trailer Park Inc73 people · Groundwater · Maine · lists this cityNot in EPA's PFAS sample
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Auburn 4 mi Auburn Water District | None above limits | 5 ppb |
| Portland 31 mi Portland Water District – Greater | None above limits | 1.5 ppb |
| South Portland 32 mi Portland Water District – Greater | None above limits | 1.5 ppb |
| Bangor 85 mi Bangor Water District | None above limits | 7.45 ppb |
Lewiston ZIP codes (1)
- 04240
Questions
Is Lewiston tap water safe to drink?
Lewiston Water & Sewer Division has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.
Who supplies water in Lewiston, ME?
2 public water systems serve parts of Lewiston. The largest is Lewiston Water & Sewer Division (23,720 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.
Does Lewiston tap water have PFAS?
None detected above EPA's reporting limits. Lewiston Water & Sewer Division had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.
Do Lewiston homes have lead pipes?
Census estimates put 80% of Lewiston homes as built before 1980 (Maine: 54%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Lewiston Water & Sewer Division's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.