We found 23 public water systems that could serve the same population as St. Lawrence State Park (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Quality Inn/gran View | Oswegatchie | 350 | 0 | 17 |
| 1000 Islands Koa | Oswegatchie | 300 | 0 | 0 |
| Acco | Oswegatchie | 250 | 0 | 0 |
| Morleys Mobile Park | Oswegatchie | 150 | 0 | 3 |
| Eel Weir State Park | Oswegatchie | 140 | 0 | 11 |
| Stone Fence Motel, The | Oswegatchie | 100 | 0 | 0 |
| Windjammer Lodge | Oswegatchie | 75 | 0 | 0 |
| River Lane Campground | Oswegatchie | 70 | 0 | 0 |
| Gilbert Greens Country Club | Oswegatchie | 65 | 0 | 0 |
| Academy At Ivy Ridge | Oswegatchie | 56 | 0 | 0 |
| Web, The | Oswegatchie | 48 | 0 | 0 |
| Cedars Complex | Oswegatchie | 40 | 0 | 0 |
| Dog House | Oswegatchie | 30 | 0 | 0 |
| Loon Landing Camps | Oswegatchie | 30 | 0 | 0 |
| Pcp Bbq Catering | Oswegatchie | 25 | 0 | 0 |
| Terrys Variety Store | Oswegatchie | 25 | 0 | 0 |
| Breeze In - Ogdensburg | Oswegatchie | 25 | 0 | 0 |
| Wadhams Hall | Oswegatchie | 25 | 0 | 0 |
| Perrys Place | Oswegatchie | 25 | 0 | 0 |
| WOODS FARM MARKET & GARDEN CENTER | Oswegatchie | 25 | 0 | 0 |
| Heuvelton Deli | Oswegatchie | 25 | 0 | 0 |
| Ward Willard Packing | Oswegatchie | 25 | 0 | 0 |
| Primax Properties (dg Heuvelton) | Oswegatchie | 25 | 0 | 0 |