| A & L Laboratory | 207-784-5354 | 3100 Hotel Rd | Auburn | ME | 04210 |
| Adlers Plumbing & Heating | 207-783-7114 | 20 Paul St | Auburn | ME | 04210 |
| Ag Engineers Inc | 207-854-2481 | Walnut Crest Rd | Gorham | ME | 04038 |
| Air & Water Quality Inc | 207-773-2677 | Route 302 | Windham | ME | 04062 |
| Anson Water District | 207-635-2211 | Elm | North Anson | ME | 04958 |
| Aquaflo Systems From Biddeford Saco Goodwins M | 207-283-4656 | 14 Harrison Ave | Biddeford | ME | 04005 |
| Aroostook Water Care Inc | 207-532-3005 | RR 1 | Houlton | ME | 04730 |
| Ashland Pumping Sta | 207-435-6927 | Garfield Rd | Ashland | ME | 04737 |
| Augusta Water District | 207-622-3701 | 12 Williams St | Augusta | ME | 04330 |
| Bangor Water District Main Ofc | 207-947-4516 | 614 State St | Bangor | ME | 04401 |
| Bar Harbor Water Co Office | 207-288-3555 | 337 Main St | Bar Harbor | ME | 04609 |
| Bath Water District Ofc | 207-443-2391 | 1 Lambard St | Bath | ME | 04530 |
| Biddeford & Saco Water Co | 207-282-1543 | 181 Elm St | Biddeford | ME | 04005 |
| Biddeford & Saco Water Co Pumping Sta | 207-282-9141 | 466 South St | Biddeford | ME | 04005 |
| Boothbay Harbor Water System | 207-633-4723 | 11 Howard St | Boothbay Harbor | ME | 04538 |
| Bridgton Water Dept | 207-647-2881 | 42 Main St | Bridgton | ME | 04009 |
| Brunswick & Topsham Water Dist Ofc | 207-729-9956 | Old Lewiston Rd | Topsham | ME | 04086 |
| Brunswick Sewer District | 207-729-0148 | 10 Pine Tree Rd | Brunswick | ME | 04011 |
| Brunswick-Palmer Wall Drilling | 207-729-3262 | Maine St | Brunswick | ME | 04011 |
| Burbanks Landscaping & Irrigation | 207-324-5219 | Wells Rd | Sanford | ME | 04073 |
| Butler Wayne Gen Ins | 207-929-8660 | 2 Joyce Ave | Buxton | ME | 04072 |
| Castine Water District | 207-326-8540 | Battle Ave | Castine | ME | 04421 |
| Central Security Systems | 207-384-2918 | 11 Pond Rd | South Berwick | ME | 03908 |
| Clean Water Service Of Maine | 207-284-8464 | 207 Pool St | Biddeford | ME | 04005 |
| Clinton Water District | 207-426-8039 | Rt 100 | Clinton | ME | 04927 |
| Consumers Maine Water Co | 207-236-8428 | 75 Maverick St # 855 | Rockland | ME | 04841 |
| Consumers Maine Water Co | 207-723-8731 | Route 11 N | Millinocket | ME | 04462 |
| Consumers Maine Water Company | 207-695-2912 | Norris | Greenville | ME | 04441 |
| Consumers Maine Water Company Filter Plant | 207-723-9370 | Route 11 N | Millinocket | ME | 04462 |
| Demers Laboratory Inc | 207-324-2074 | 71 Main St | Springvale | ME | 04083 |
| Dexter Utility District Office | 207-924-7367 | 366 Main St | Dexter | ME | 04930 |
| Dunbar Water Filtration | 207-646-4290 | Natanis Ridge Cir | Wells | ME | 04090 |
| Dunham Merl Sam Inc Artsn Wells | 207-285-3306 | Morrisn Ave E | East Corinth | ME | 04427 |
| East Pittston Water District | 207-582-1359 | Route 194 | Gardiner | ME | 04345 |
| Farley & Son Landscaping Svcs | 207-236-4787 | Route 1 | Rockland | ME | 04843 |
| Farmington Water Dept | 207-778-4777 | 21 High St | Farmington | ME | 04938 |
| Forest Pump & Filter Inc | 207-892-7867 | Route 302 N | Windham | ME | 04062 |
| Fred Perry & Daughters | 207-833-5011 | Harpswell Neck Rd | Harpswell | ME | 04079 |
| Gardiner Water District | 207-582-5500 | 246 Water St | Gardiner | ME | 04345 |
| Glatz Associates | 207-761-8064 | 190 Riverside | Portland | ME | 04103 |
| Great Salt Bay Sanitary District Water Divisio | 207-563-3010 | School | Damariscotta | ME | 04543 |
| Guilford & Sangerville Water | 207-876-3066 | Hudson Ave | Guilford | ME | 04443 |
| Hallowell Water District | 207-623-9151 | 60 Winthrop St | Hallowell | ME | 04347 |
| Hansens Well Drill Inc | 207-839-3293 | 68 Phinney St | Gorham | ME | 04038 |
| Haskell Well Drilling Inc | 207-594-4947 | 725 Commercial St | Rockport | ME | 04856 |
| Hews G C Enterprises | 207-453-9017 | 1 Newhall St | Fairfield | ME | 04937 |
| Houlton Water Co Ofc | 207-532-2259 | Bangor | Houlton | ME | 04761 |
| Irrigation Syst Of Maine From | 207-846-9344 | 28 Main St | Yarmouth | ME | 04096 |
| Kennebec Water District | 207-872-2763 | 5 South St | Waterville | ME | 04901 |
| Kennebunk Kennebunkport & Wells Water Dist Eme | 207-985-2362 | 92 Main St | Kennebunk | ME | 04043 |
| Kennebunk Kennebunkport & Wells Water District | 207-985-3385 | 92 Main St | Kennebunk | ME | 04043 |
| Kittery Water District | 207-439-0775 | Storehse State Rd | Kittery | ME | 03904 |
| Labay R M Plumbing & Heating | 207-743-6378 | Hebron Rd | South Paris | ME | 04281 |
| Lawsons Plumbing | 207-582-6354 | 448 West St | Gardiner | ME | 04345 |
| Lead Removal Filters | 207-657-4226 | 97 Totton Rd | Gray | ME | 04039 |
| Limestone Water & Sewer District | 207-325-4788 | New Van Buren Rd | Limestone | ME | 04751 |
| Livermore Falls Water District Ofc | 207-897-3445 | 28-1/2 Depot St | Livermore Falls | ME | 04254 |
| Lubec Water & Electric | 207-733-5526 | Pumping Station Rd | Lubec | ME | 04652 |
| Machias Water Co | 207-255-3011 | Water | Machias | ME | 04654 |
| Maine Poultry Consultants | 207-873-7711 | China Rd | Winslow | ME | 04903 |
| Maine Water Utilities Association | 207-832-2263 | 1419 Coles Hill Rd | Waldoboro | ME | 04572 |
| Mars Hill & Blaine Water Co Filter Plant | 207-429-8819 | Young Lake Rd | Westfield | ME | 04787 |
| Mcfarland Associates Inc | 207-892-4485 | Rt 115 | Windham | ME | 04062 |
| Mexico Water District Ofc | 207-364-2061 | Main | Mexico | ME | 04257 |
| Mexico Water District Ofc Treatment Plant | 207-364-2195 | Roxbury Rd | Mexico | ME | 04257 |
| Milo Water District Plant | 207-943-8812 | Pleasant | Milo | ME | 04463 |
| Milo Water District-Ofc | 207-943-2501 | 68 Main St | Milo | ME | 04463 |
| Multi-Pure Nationwide Community Services | 207-247-5412 | 54 New Rd | Waterboro | ME | 04087 |
| Newport Water District | 207-368-4314 | Main | Newport | ME | 04953 |
| Norlens Water Treatment Service | 207-825-4964 | Route 15 | Orrington | ME | 04474 |
| Northeast Harbor Water Co | 207-276-3733 | Tracey Rd | New Harbor | ME | 04554 |
| Norway Water District | 207-743-2414 | 26 Danforth St | Norway | ME | 04268 |
| Oak Grove Spring Water Co | 207-989-2475 | 480 N Main St | Brewer | ME | 04412 |
| Paris Utility Dist | 207-743-6251 | 65 Park St | South Paris | ME | 04281 |
| Passamaquoddy Water Dist | 207-853-2924 | Cunty Rd | Eastport | ME | 04631 |
| Perkins Plumbing | 207-864-5883 | Pleasant | Rangeley | ME | 04970 |
| Portland Water District All Other Business | 207-774-5961 | 225 Douglass St | Portland | ME | 04102 |
| Rainmaker Irrigation | 207-892-2899 | 936 Roosevelt Trl | Windham | ME | 04062 |
| Rangeley Water District | 207-864-5680 | Main | Rangeley | ME | 04970 |
| Residential Systems Specialist | 207-338-2020 | 125 High St | Belfast | ME | 04915 |
| Richmond Utilities District Ofc | 207-737-4721 | N Front | Richmond | ME | 04357 |
| Rumford Water Dist Ofc | 207-364-8531 | 15 Spruce St | Rumford | ME | 04276 |
| Rumford Water Dist Ofc Supt | 207-364-2891 | 15 Spruce St | Rumford | ME | 04276 |
| Sanford Water District | 207-324-2312 | River | Springvale | ME | 04083 |
| Sanford Water District | 207-324-5355 | Pumping Sta River | Sanford | ME | 04073 |
| Solon Water District | 207-643-2473 | N Main | Solon | ME | 04979 |
| Waldoboro Water Co | 207-832-4655 | Jefferson St | Waldoboro | ME | 04572 |
| Washburn Water Co | 207-455-4010 | Pleasant | Washburn | ME | 04786 |
| Watermatic Irrigation Co Inc | 207-883-4170 | 156 Pleasant Hill Rd | Scarborough | ME | 04074 |
| West Mark Plumbing & Water Treatment | 207-354-6800 | St George Rd S | Thomaston | ME | 04861 |
| Whitman & Howard Inc | 207-363-4252 | 28 New Boston Rd | York | ME | 03909 |
| Yarmouth Water District | 207-829-3376 | Baston Rd N | Yarmouth | ME | 04097 |
| Yarmouth Water District | 207-846-5821 | 50 E Elm St | Yarmouth | ME | 04096 |
| York Water District | 207-363-2265 | 86 Woodbridge Rd | York | ME | 03909 |
