We found 38 public water systems that could serve the same population as Luna Restaurant & Bar (prev. Salty Dog) (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Shelter Island Heights Association | Shelter Island | 463 | 0 | 94 |
| Shelter Island School | Shelter Island | 315 | 0 | 0 |
| Dering Harbor Corp | Shelter Island | 250 | 0 | 2 |
| Dory Restaurant | Shelter Island | 250 | 0 | 3 |
| Kyle's (previously Cafe 27) | Shelter Island | 150 | 0 | 3 |
| Camp Quinipet | Shelter Island | 150 | 0 | 7 |
| Coecles Harbor Marina | Shelter Island | 150 | 0 | 2 |
| Whales Tale | Shelter Island | 150 | 0 | 1 |
| Dering Harbor Water District | Shelter Island | 136 | 0 | 33 |
| Pridwin Hotel | Shelter Island | 100 | 0 | 0 |
| Crescent Beach | Shelter Island | 100 | 0 | 0 |
| Island Boatyard & Marina | Shelter Island | 100 | 0 | 0 |
| American Legion Post #281 | Shelter Island | 100 | 0 | 0 |
| West Neck Water Supply | Shelter Island | 100 | 0 | 0 |
| Shelter Island Iga Market | Shelter Island | 100 | 0 | 0 |
| Schmidt's Market (fna Fedis Market) | Shelter Island | 100 | 0 | 0 |
| Gardiners Bay Country Club | Shelter Island | 100 | 0 | 0 |
| Bella Vita Pizza (prev. Primo Pizza) | Shelter Island | 100 | 0 | 0 |
| Saint Gabriels Retreat House | Shelter Island | 84 | 0 | 0 |
| Vine Street Cafe | Shelter Island | 80 | 0 | 0 |
| Perlman Music School | Shelter Island | 80 | 0 | 0 |
| John's Grill (was Osprey Cafe) | Shelter Island | 75 | 0 | 0 |
| Bridge Street Water | Shelter Island | 75 | 0 | 0 |
| Islander(pat & Steves Family Restaurant | Shelter Island | 75 | 0 | 0 |
| Shelter Island Nutrition Program | Shelter Island | 75 | 0 | 0 |
| Wades Beach | Shelter Island | 75 | 0 | 0 |
| Cards Cottages | Shelter Island | 60 | 0 | 0 |
| Bella Vita (fna Clark's Fish House) | Shelter Island | 60 | 0 | 0 |
| Rams Head Inn | Shelter Island | 50 | 0 | 0 |
| Commander Cody Seafood | Shelter Island | 50 | 0 | 0 |
| Mashomack Pres. Visitor Ctr. | Shelter Island | 50 | 0 | 0 |
| All Seasons Catering | Shelter Island | 50 | 0 | 0 |
| Bobs Fishmarket & Restaurant | Shelter Island | 50 | 0 | 0 |
| Eagle Deli (fna West Neck Island Market) | Shelter Island | 50 | 0 | 0 |
| Elli's Country Market | Shelter Island | 50 | 0 | 0 |
| Shelter Island Senior Citizens Center | Shelter Island | 35 | 0 | 0 |
| Two South Ferry B & B | Shelter Island | 30 | 0 | 0 |
| Maria's Kitchen | Shelter Island | 25 | 0 | 0 |