| Admirals Cove Water District |
| Bayview Beach Water District |
| Bush Point Water District |
| Camano Vista Water District |
| City of Langley |
| City of Oak Harbor |
| Clinton Water District |
| Crocket Lake Water District |
| Freeland Water District |
| Holmes Harbor Water District |
| Juniper Beach Water District |
| Lagoon Point Water District |
| Lakeview Terrace Water District |
| Ledgewood Beach Water District |
| Long Beach Water District |
| Main Street Sewer District / Freeland Water District |
| North Whidbey Water District |
| Penn Cove Sewer and Water |
| Rhodena Beach Water District |
| Saratoga Water District |
| Skatchet Head Water District |
| Swantown Water District |
| Town of Coupeville |
