
Maine Beach Water Quality
What Maine Healthy Beaches, Maine Department of Environmental Protection monitors at Maine beaches, how much of the coast that covers, and where it publishes today's advisory status.
EPA's 2025 record: 66 of 106 Maine beaches were sampled for bacteriaMaine in EPA’s 2025 swimming season report
Last verified season, not todayMaine keeps most of the beaches EPA counts outside the reporting program. Every figure here is EPA’s, from the 2025 season as its database stood on September 02, 2026. It describes last season’s monitoring rather than today’s status, and none of it says any water is safe.
Where Maine publishes current advisories
Maine runs the widest gap in the country between beaches EPA counts and beaches in the program: 66 of the 106 BEACH Act beaches here participate, and Maine DEP describes the programme as over 60 beaches spanning roughly 200 miles from Kittery to Acadia National Park. Participation is municipal, so whether a given town beach is monitored is a town by town question, and DEP tells you to look for the Maine Healthy Beaches sign at the entrance to know.
For the record, EPA’s BEACON jurisdiction page lists Maine Department of Environmental Protection as the Maine beach program agency, with its own stored link. EPA’s stored links are not always current; the advisory link above is the verified one. EPA BEACON jurisdiction detail for Maine
EPA’s three counts for Maine Most beaches outside the program
EPA keeps a national list of beaches and sorts them three ways: every BEACH Act beach it counts, the subset in a reporting programme, and the subset of those that a monitoring programme actually sampled at least once during the season. The distance between the first and the last is the useful number, and in Maine it is 40 beaches.
- 106 BEACH Act beaches
- 66 program beaches (62%)
- 66 sampled at least once (100% of program)
EPA BEACON, 2025 swimming season, as the database stood on September 02, 2026. EPA’s counts and EPA’s definitions.
Maine is one of 11 states where most beaches on EPA’s national list sit outside the reporting programme, which EPA marks Tier 4. That is not always a criticism. An inventory can include long stretches of shoreline that nobody swims at, and a programme that concentrates on the places people actually go is making a defensible choice. It does mean that being at a beach in Maine is not the same as being at a monitored beach, and the state’s own list is the way to tell.
US EPA, Find Information about a Particular U.S. Beach“This National List of Beaches provides information whether a beach that is included in a water quality monitoring and public notification program is monitored or not, or if it is not part of the program (those are shown as “Tier 4” in the list).”
The Maine monitoring season
Maine Healthy Beaches, Maine Department of Environmental Protection does not publish a single statewide monitoring season: in several states sampling frequency is set per site by a risk ranking, or delegated to county programmes that each run their own calendar, so there is no one window to give.
Sampling everywhere concentrates in the swimming months and thins out or stops outside them, so the absence of a posting off season is usually the absence of a sample. Maine Healthy Beaches current beach status shows what is currently being sampled.
How Maine runs beach monitoring
In Maine Department of Environmental Protection’s own words, from its own page, with the authorship check shown underneath.
Maine Department of Environmental Protection“There are over 60 participating beaches in the program spanning approximately 200 miles from Kittery to Acadia National Park.”
The division of labour is the same everywhere and it is worth knowing before you make a phone call. EPA writes the performance criteria and funds the programme, the state runs the sampling and sets the threshold, and in many states the actual posting decision belongs to a county health officer.
US EPA, Beach Grants“The EPA awards grants under authority of the BEACH Act to eligible states, territories and Tribes with beaches on ocean and Great Lakes coasts to develop and implement programs to monitor their beaches and notify the public when it is not safe to swim. During each swimming season, state and local health and environmental protection agencies monitor the quality of water at the nation’s beaches. When bacteria levels in the water are too high, these agencies notify the public by posting warnings or closing the beach.”
US EPA, Find Information about a Particular U.S. Beach“States, Tribes, territories and local governments decide whether to open or close a beach.”
What a Maine advisory does and does not mean
A posting is triggered by a count of fecal indicator bacteria: enterococci in marine water, Escherichia coli in the Great Lakes and most fresh water. Neither organism is usually the thing that makes people ill. They are counted because sewage and animal waste carry them in enormous numbers, so a high count is evidence that the pathogens that do cause illness are probably present.
US EPA, What Affects Human Health at the Beach“In the event that beaches are closed or advisories are posted, it is most often because water samples for certain bacteria indicate that harmful bacteria, viruses, protozoa, or parasites are likely present in the waters.”
Four things follow. A bacteria posting says nothing about algal toxins, chemicals or rip currents, which are separate programmes. The result is a laboratory result, so it describes water that was in front of somebody about a day earlier. The threshold is a number rather than a cliff, and thresholds differ by state. And the cause is almost always rain, which is why the practical advice is about timing rather than about any particular beach.
US EPA, What Affects Human Health at the Beach“Polluted runoff (water that drains after rainfall) and untreated sewage released into the water can expose swimmers to harmful microorganisms called “pathogens.” These pathogens can be present at or near the site where polluted discharges enter the water.”
US EPA, What Affects Human Health at the Beach“Be aware of any signs indicating the beach is closed or the water is not safe because of bacteria, riptides or other hazards. In areas that are not monitored regularly, choose swimming sites in less developed areas with good water circulation, such as beaches at the ocean. Avoid swimming at beaches where you can see discharge pipes or at urban beaches after a heavy rainfall.”
If you want the shortest useful rule for Maine or anywhere else: check the state page before you leave, read the sign at the access point when you arrive, stay out for a day or two after heavy rain, keep away from the sand next to a visible outfall or creek mouth, and try not to swallow the water.
US EPA, What Affects Human Health at the Beach“When waterborne pathogens are present, most swimmers are exposed when they swallow the water. You will be less likely to get sick if you wade or swim without putting your head under water.”
US EPA, What Affects Human Health at the Beach“Children, the elderly and people with weakened immune systems are the most likely populations to develop illnesses or infections after coming into contact with polluted water, usually while swimming.”

Maine against the other 29 BEACH Act states
Ordered by the number of beaches EPA counts. A state with more monitored beaches is not a cleaner state, and a state with a lot of unmonitored beaches may simply have a very long shoreline.
| State | BEACH Act beaches | Program beaches | Sampled | Program miles | Shape |
|---|---|---|---|---|---|
| Washington | 1,228 | 84 | 61 | 51.22 | Most beaches outside the program |
| Michigan | 594 | 580 | 210 | 134.79 | Enrolled, mostly not sampled |
| Massachusetts | 574 | 573 | 572 | 237.46 | Enrolled and sampled |
| Florida | 560 | 232 | 232 | 485.65 | Most beaches outside the program |
| New Jersey | 454 | 211 | 211 | 14.36 | Most beaches outside the program |
| Hawaii | 408 | 408 | 173 | 114.47 | Enrolled, mostly not sampled |
| New York | 354 | 353 | 328 | 134.71 | Enrolled and sampled |
| California | 252 | 248 | 248 | 701.42 | Enrolled and sampled |
| North Carolina | 227 | 225 | 225 | 421.61 | Enrolled and sampled |
| Alaska | 214 | 11 | 11 | 17.69 | Most beaches outside the program |
| Wisconsin | 195 | 117 | 117 | 41.16 | Most beaches outside the program |
| Texas | 168 | 168 | 61 | 153.98 | Enrolled, mostly not sampled |
| Maine | 106 | 66 | 66 | 31.51 | Most beaches outside the program |
| Oregon | 89 | 24 | 24 | 28.51 | Most beaches outside the program |
| Rhode Island | 82 | 67 | 67 | 24.21 | Most beaches outside the program |
| Minnesota | 80 | 38 | 37 | 31.94 | Most beaches outside the program |
| Ohio | 76 | 76 | 76 | 49.44 | Enrolled and sampled |
| Connecticut | 72 | 72 | 71 | 19.02 | Enrolled and sampled |
| Maryland | 59 | 59 | 59 | 31.7 | Enrolled and sampled |
| Illinois | 57 | 56 | 48 | 15.61 | Enrolled and sampled |
| Virginia | 47 | 47 | 47 | 58.15 | Enrolled and sampled |
| Georgia | 38 | 28 | 28 | 37.45 | Most beaches outside the program |
| Alabama | 24 | 24 | 24 | 31.74 | Enrolled and sampled |
| Louisiana | 24 | 23 | 23 | 20.57 | Enrolled and sampled |
| Indiana | 24 | 24 | 24 | 33.14 | Enrolled and sampled |
| Delaware | 22 | 22 | 22 | 29.02 | Enrolled and sampled |
| South Carolina | 21 | 21 | 21 | 105.3 | Enrolled and sampled |
| Mississippi | 21 | 21 | 21 | 46.2 | Enrolled and sampled |
| New Hampshire | 16 | 16 | 16 | 8.76 | Enrolled and sampled |
| Pennsylvania | 13 | 10 | 9 | 2.19 | Most beaches outside the program |
Maine beach water quality FAQ
More from the Maine coast
Beach water quality by state
Beach water quality across the country, including the 20 states with no BEACH Act programme and the reason for each.
All counts on this page are reproduced from the EPA BEACON 2.0 Dynamic National Report for the 2025 swimming season as the database stood on September 02, 2026, a US Government work in the public domain. Federal quotations are verbatim from EPA and CDC; state quotations are verbatim from agency public records with the authorship check shown. Current advisory status is published by Maine Healthy Beaches, Maine Department of Environmental Protection, which issues and lifts the advisories for Maine.
Hero image: “Coney Island beach on Memorial Day” by David Reilly, CC BY 2.0