We found 33 public water systems that could serve the same population as Gregory Ice Cream Parlor (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| St Johnsbury Water System | St. Johnsbury | 5,000 | 47 | 17 |
| St Johnsbury Center F D 1 | St. Johnsbury | 370 | 0 | 72 |
| Mount Pleasant Communities | St. Johnsbury | 236 | 0 | 0 |
| Green Lantern Mhp | St. Johnsbury | 144 | 0 | 0 |
| Emerson Falls Business Park | St. Johnsbury | 131 | 0 | 6 |
| Nvrh Water System | St. Johnsbury | 125 | 0 | 6 |
| Country Rest.&lounge | St. Johnsbury | 97 | 0 | 0 |
| Rileys Fish Shack | St. Johnsbury | 74 | 0 | 0 |
| 71 Depot Hill | St. Johnsbury | 55 | 0 | 0 |
| Mr. Z's | St. Johnsbury | 50 | 0 | 0 |
| Sunny Kitchen, The | St. Johnsbury | 50 | 0 | 0 |
| Maple Center Motel | St. Johnsbury | 50 | 0 | 0 |
| St. Johnsbury Baseball | St. Johnsbury | 50 | 0 | 0 |
| Jonathans Mill | St. Johnsbury | 50 | 0 | 0 |
| Eddies Sub Shop | St. Johnsbury | 50 | 0 | 0 |
| Surf & Sirloin | St. Johnsbury | 50 | 0 | 0 |
| Aimes Restaurant | St. Johnsbury | 50 | 0 | 0 |
| Lamplighter Lounge | St. Johnsbury | 50 | 0 | 0 |
| Grandpas Cigar | St. Johnsbury | 50 | 0 | 0 |
| Mcdonalds Restaurant | St. Johnsbury | 50 | 0 | 0 |
| Aimes Motel | St. Johnsbury | 50 | 0 | 0 |
| YANKEE TRAVELER MOTEL | St. Johnsbury | 50 | 0 | 0 |
| Vermont Holiday Motel | St. Johnsbury | 50 | 0 | 0 |
| St. J. House Of Pizza | St. Johnsbury | 50 | 0 | 0 |
| Soup Cellar | St. Johnsbury | 50 | 0 | 0 |
| St. Johnsbury Ctry. Club | St. Johnsbury | 50 | 0 | 0 |
| George's Pizza | St. Johnsbury | 50 | 0 | 0 |
| 2 N Q Lounge | St. Johnsbury | 50 | 0 | 0 |
| Shamrock Rest & Lounge | St. Johnsbury | 50 | 0 | 0 |
| Hilltopper Restaurant | St. Johnsbury | 50 | 0 | 0 |
| Archies Bakery & Coffee | St. Johnsbury | 50 | 0 | 0 |
| Lincoln Inn, Inc. | St. Johnsbury | 50 | 0 | 0 |
| St Johnsbury Regional Library | St. Johnsbury | 25 | 0 | 0 |