Lead In Drinking Water In Maine
What residents of Maine need to know about lead in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, Maine Drinking Water Program (Maine CDC / DHHS), CDC · Last reviewed: 2025-01-01
Quick Answer
Is lead in drinking water a real concern in Maine?
Yes — Maine has one of the oldest housing stocks per capita in the nation. Portland, Lewiston, Bangor, and Augusta have high concentrations of pre-1900 housing where lead service lines and lead solder are common.
Is this mostly a public-water issue, a private-well issue, or both?
Both public water service lines and household plumbing; Maine's older urban neighborhoods and many rural small-town water systems have aging infrastructure.
What is the main reason residents should care?
Maine's naturally soft, acidic groundwater — fed by granite terrain — is among the most corrosive state-level water chemistry profiles in the country. Soft, low-pH water dissolves lead from pipes and solder more aggressively than hard water, making the age of Maine's housing stock especially relevant to lead exposure risk.
Key Facts
| Federal Lead Action Level | 15 µg/L — no safe level per CDC |
| Housing stock age | Among the oldest per-capita in the nation — Portland, Lewiston, Bangor have dense pre-1900 housing |
| Water chemistry risk | Granite-terrain groundwater is naturally soft and slightly acidic — highly corrosive to lead |
| School lead programs | Maine has implemented lead testing programs for school drinking water |
| State oversight | Maine Drinking Water Program (Maine CDC / DHHS) |
Why This Matters in Maine
Maine has a smaller population but one of the oldest per-capita housing inventories in the country. Portland's Munjoy Hill and West End, Lewiston's older French-Canadian immigrant neighborhoods, Bangor's downtown and residential streets, and virtually all of Augusta have concentrations of housing built in the 19th and early 20th centuries — long before federal bans on lead plumbing. Maine's water, particularly from granite-bedrock groundwater sources in inland areas, tends to be naturally soft and slightly acidic, which increases the rate at which lead leaches from pipes and solder. The Maine Drinking Water Program enforces the Lead and Copper Rule and requires utilities to complete lead service line inventories. Maine has also implemented programs targeting lead in school drinking water.
Maine Utilities With Lead Violation Records
The utilities listed below have at least one lead violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
Bangor Water District
Bangor,Clifton,Eddington,Hampden,Hermon,Orrington,Veazie · 27,298 served
Kennebec Water District
Fairfield,Oakland,Vassalboro,Waterville,Winslow · 22,060 served
Maine Water Company Camden & Rockland
Camden,Owls Head,Rockland,Rockport,Thomaston,Warren · 21,315 served
Brunswick/topsham Water District
Brunswick,Topsham · 18,863 served
Auburn Water District
Auburn · 17,245 served
Kittery Water District
Kittery · 14,478 served
York Water District
York · 13,675 served
How Lead Gets Into Drinking Water
Lead service lines
The pipe connecting a home to the water main may be made of lead, especially in pre-1986 construction. Water sitting in these lines can accumulate lead before it reaches the tap.
Lead solder
Lead solder at pipe joints was banned for potable water systems in 1986. Homes built before that date — including significant portions of older Maine cities — may still have lead solder throughout their plumbing.
Older brass fixtures
Faucets, valves, and fixtures with high lead content were common before the 2014 revision of 'lead-free' standards. Replacing older fixtures at kitchen and drinking taps can meaningfully reduce exposure.
Corrosive water chemistry
Soft, acidic, or low-alkalinity water dissolves lead from plumbing more readily. Utilities use orthophosphate and other corrosion control treatments, but household plumbing after the meter is not within their control.
Who Should Pay Closest Attention
Families with young children in Portland, Lewiston, and Bangor older neighborhoods, households in rural Maine using private wells with older submersible pump fixtures, and renters in pre-1940 Maine housing should prioritize using a certified NSF/ANSI 53 or 58 filter for drinking and cooking water.
Families with children under six
Pregnant residents
Households in homes built before 1986
Renters who cannot inspect building plumbing
Residents on a confirmed lead service line
Households that had plumbing work done recently (disturbances dislodge protective scale)
How to Check Your Situation in Maine
- 1
Identify your water utility. Use the ZIP lookup below or browse the Maine utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open lead violations.
- 3
Contact your utility and ask for your address-level service line material status. Under the federal Lead and Copper Rule Revisions (LCRR), utilities must maintain and provide this information.
- 4
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website.
- 5
Consider testing your tap water at a Maine Drinking Water Program (Maine CDC / DHHS)-certified lab. Your state health department or Maine Drinking Water Program (Maine CDC / DHHS) maintains a list of certified labs.
- 6
If you have young children or are pregnant, install a certified NSF/ANSI 53 or 58 filter at the kitchen tap as a precautionary measure.
Treatment Options
Boiling does not remove lead. Use a certified filter for drinking and cooking water.
NSF/ANSI Standard 53 — Activated Carbon Block
Under-sink or pitcher filters certified to Standard 53 are independently verified to reduce lead. Replace filters on the manufacturer's schedule — an overdue filter may not perform as certified.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to Standard 58 remove 95–99% of lead and a broad range of contaminants. Requires under-sink installation. More comprehensive than Standard 53 for households with multiple contaminant concerns.
Flushing — temporary mitigation only
EPA recommends flushing the cold tap for 30 seconds to 2 minutes if water has sat in pipes for 6+ hours. Not a substitute for certified filtration or service line replacement.
Frequently Asked Questions
Related Pages
Lead — National Overview
All U.S. utilities with lead records
Maine State Overview
All utilities and water quality data
Nitrate in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 95–99% of lead
Activated Carbon Filter Guide
NSF/ANSI 53 certified options
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
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Maine Drinking Water Program (Maine CDC / DHHS) ↗