Waldo County, Maine — public water systems
At a glance
75 active public water systems are filed under Waldo County, Maine in EPA's SDWIS records, together reporting 19,252 people served. The largest is Belfast Water District, which reports serving 5,698 people. 18 are community water systems serving people where they live; the other 57 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
75
Population served
19.3K
Community systems
18
Groundwater share
100%
How does Waldo County compare with other Maine counties?
Waldo County has the 12th-most active public water systems among the 17 counties listed for active Maine systems in EPA records; among the 16 with 3 or more systems, the median has 105. Its systems report 19,252 people served in total, the 14th-largest county figure in the state and 2.1% of the statewide total. The average system here reports serving 257 people, about half of the Maine average of 503. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Waldo County's drinking water come from?
By primary water source, Waldo County's active systems draw on groundwater (74, 99%) and purchased groundwater (1, 1.3%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 96% and 3.7% across Maine. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Belfast Water District, draws primarily on groundwater.
What kinds of water systems operate in Waldo County?
Waldo County's active systems break down as 18 community systems (24%), 15 non-transient non-community systems (20%) and 42 transient non-community systems (56%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (76%), local government (19%) and state government (5.3%).
The 50 largest water systems in Waldo County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Belfast Water District | Waldo | 5,698 | Community | Groundwater |
| 2 | Searsport Water District | Waldo | 2,763 | Community | Groundwater |
| 3 | Rsu 03 Mt View School | Waldo | 1,100 | Non-transient non-community | Groundwater |
| 4 | Winterport Water District | Waldo | 763 | Community | Groundwater |
| 5 | Fort Knox | Waldo | 592 | Transient non-community | Groundwater |
| 6 | Northport Village Corp Water Dept | Waldo | 550 | Community | Purchased groundwater |
| 7 | Bowens Pizzeria & Deli LLC | Waldo | 450 | Transient non-community | Groundwater |
| 8 | Mclaughlins Lobster Shack | Waldo | 380 | Transient non-community | Groundwater |
| 9 | Tarratine Yacht Club | Waldo | 362 | Transient non-community | Groundwater |
| 10 | Penobscot Narrows Observatory | Waldo | 326 | Transient non-community | Groundwater |
| 11 | Msu 69 Lincolnville Central School | Waldo | 260 | Non-transient non-community | Groundwater |
| 12 | Belfast Curling Club | Waldo | 230 | Transient non-community | Groundwater |
| 13 | Ridge Top Restaurant | Waldo | 225 | Transient non-community | Groundwater |
| 14 | Northport Travel Park | Waldo | 205 | Transient non-community | Groundwater |
| 15 | Fair Haven Camps | Waldo | 192 | Transient non-community | Groundwater |
| 16 | Youngtown Inn | Waldo | 192 | Transient non-community | Groundwater |
| 17 | Loris Cafe | Waldo | 190 | Transient non-community | Groundwater |
| 18 | Mdoc State Park-Lake St George | Waldo | 184 | Transient non-community | Groundwater |
| 19 | Waldo County Technical Center | Waldo | 181 | Non-transient non-community | Groundwater |
| 20 | Savz Inc. | Waldo | 180 | Transient non-community | Groundwater |
| 21 | The Lost Kitchen Mill | Waldo | 168 | Transient non-community | Groundwater |
| 22 | Rsu 12 Palermo Consolidated School | Waldo | 151 | Non-transient non-community | Groundwater |
| 23 | Clifford Arts & Student Center | Waldo | 150 | Transient non-community | Groundwater |
| 24 | Rsu 71 Ames Elementary School | Waldo | 150 | Non-transient non-community | Groundwater |
| 25 | Islesboro Community Center | Waldo | 147 | Transient non-community | Groundwater |
| 26 | Morrill Village Water District | Waldo | 143 | Community | Groundwater |
| 27 | Tarratine Golf Restaurant | Waldo | 134 | Transient non-community | Groundwater |
| 28 | Smk Donuts Inc.-Dunkin Donuts Unity | Waldo | 133 | Transient non-community | Groundwater |
| 29 | The Ecology Learning Center | Waldo | 127 | Non-transient non-community | Groundwater |
| 30 | Tanglewood 4-H Camp | Waldo | 125 | Transient non-community | Groundwater |
| 31 | Mdoc State Park-Swan Lake | Waldo | 116 | Transient non-community | Groundwater |
| 32 | Islesboro Central School | Waldo | 115 | Non-transient non-community | Groundwater |
| 33 | Robbins Lumber | Waldo | 108 | Non-transient non-community | Groundwater |
| 34 | Rsu 71 Kermit S Nickerson School | Waldo | 107 | Non-transient non-community | Groundwater |
| 35 | Inn at Oceans Edge | Waldo | 105 | Transient non-community | Groundwater |
| 36 | Depot Country Store | Waldo | 102 | Transient non-community | Groundwater |
| 37 | The Sandy Point Water Company | Waldo | 98 | Community | Groundwater |
| 38 | Birchwood Trailer Park | Waldo | 90 | Community | Groundwater |
| 39 | Belfast Cohousing & Ecovillage Condos | Waldo | 90 | Community | Groundwater |
| 40 | Unity By the Stream LLC | Waldo | 88 | Community | Groundwater |
| 41 | Rsu 03 Troy Central School | Waldo | 85 | Non-transient non-community | Groundwater |
| 42 | Ducktrap Harbor Condominiums | Waldo | 83 | Community | Groundwater |
| 43 | Hidden Valley Camp-Pd Barn | Waldo | 75 | Transient non-community | Groundwater |
| 44 | Piper Stream Mobile Home Park | Waldo | 75 | Community | Groundwater |
| 45 | Howards Trailer Park | Waldo | 75 | Community | Groundwater |
| 46 | Camp Searsmont | Waldo | 72 | Transient non-community | Groundwater |
| 47 | Pottles Restaurant and Bar | Waldo | 72 | Transient non-community | Groundwater |
| 48 | Rsu 03 Monroe Elementary School | Waldo | 71 | Non-transient non-community | Groundwater |
| 49 | Ohana Camping | Waldo | 65 | Transient non-community | Groundwater |
| 50 | Belfast Area Childrens Center | Waldo | 63 | Non-transient non-community | Groundwater |
All other water systems in Waldo County (25)
The remaining active systems filed under Waldo County, largest first, with the population each reports serving.
- Sandy Stream Village60
- Hidden Valley Camp-Farmhouse60
- Hidden Valley Camp-Dining Hall60
- Hidden Valley Camp-Office60
- Moosehead Trail Village60
- Unity Well51
- School Street Village50
- Whispering Pines MHP50
- China Jade48
- Lake St George Apartments45
- Rsu 03 Unity Elementary School45
- Glenmoor By the Sea- Tennis Court43
- Revision Energy Montville42
- Mount Battie Motel42
- The Anchorage40
- Black Horse Inn38
- Owens General Store34
- Mdoc State Park-Warren Island32
- Camp Deforest30
- Glenmoor By the Sea28
- Johnson Property Mgt LLC28
- Belfast United Methodist Church25
- Maine Organic Farmers & Gardeners Assn25
- Circle K 7124-Liberty25
- Dollar General-Belmont25
Waldo County water systems: frequently asked questions
How many public water systems are in Waldo County, Maine?
EPA's SDWIS records file 75 active public water systems under Waldo County, Maine: 18 community systems (24%), 15 non-transient non-community systems (20%) and 42 transient non-community systems (56%).
Who supplies drinking water in Waldo County, ME?
The largest community water systems filed under Waldo County are Belfast Water District (5,698 people served), Searsport Water District (2,763 people served) and Winterport Water District (763 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Waldo County's drinking water come from groundwater or surface water?
Of the 75 active public water systems in Waldo County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Belfast Water District, uses groundwater.
Where can I find a water quality report for Waldo County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 18 community systems are filed under Waldo County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Waldo County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Maine water systems
- All Maine public water systems· 1,862 active
- Washington County· 109 systems
- Somerset County· 100 systems
- Androscoggin County· 94 systems
- Lincoln County· 84 systems
- Franklin County· 63 systems
- Knox County· 46 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Waldo County, Maine”, https://aquacensus.com/water-systems/maine/waldo (data as of October 1, 2026).