We found 50 public water systems that could serve the same population as Gem Beach Utility Co (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Ottawa County Regional Water District | Port Clinton | 17,348 | 32 | 3 |
| Ohio Adjgn Camp Perry | Port Clinton | 2,500 | 0 | 0 |
| Portage-catawba Is Water | Port Clinton | 1,375 | 0 | 0 |
| Winkes Landing | Port Clinton | 668 | 0 | 0 |
| Odnr-catawba Island St Park Pws | Port Clinton | 600 | 0 | 0 |
| County Line Store | Port Clinton | 500 | 0 | 0 |
| Herl's Harbor Pws | Port Clinton | 440 | 0 | 0 |
| Mon-ami Restaurant | Port Clinton | 364 | 0 | 0 |
| Marine/max By Treasure C | Port Clinton | 240 | 0 | 0 |
| Catawba Moorings, Inc | Port Clinton | 223 | 0 | 0 |
| Fox Haven Marina-middle | Port Clinton | 200 | 0 | 0 |
| Leisurewood Shores Subd | Port Clinton | 200 | 0 | 0 |
| West Catawba Marina | Port Clinton | 200 | 0 | 0 |
| Fox Haven Marina-north | Port Clinton | 195 | 0 | 0 |
| Harbor Park Marina & Mhp | Port Clinton | 186 | 0 | 0 |
| Skyline View Park Inc | Port Clinton | 176 | 0 | 0 |
| Carter Lumber | Port Clinton | 175 | 0 | 0 |
| Catawba Island Marina-s | Port Clinton | 165 | 0 | 0 |
| Breezy Acres Mhp | Port Clinton | 125 | 0 | 0 |
| Cic Golf Club Pws | Port Clinton | 125 | 0 | 0 |
| Catawba Inn | Port Clinton | 125 | 0 | 0 |
| Catawba Shores Condo Assoc Pws | Port Clinton | 105 | 0 | 0 |
| Dairy At The Dock | Port Clinton | 104 | 0 | 0 |
| Catawba Elementary Scl. | Port Clinton | 102 | 0 | 0 |
| Grace Baptist Church | Port Clinton | 100 | 0 | 0 |
| The Point Pws | Port Clinton | 100 | 0 | 0 |
| Orchard Isle Mhp #1 | Port Clinton | 100 | 0 | 0 |
| Fox Haven Marina-south | Port Clinton | 100 | 0 | 0 |
| Hillside Mhp | Port Clinton | 98 | 25 | 0 |
| Resurrection Lutheran Church Pws | Port Clinton | 90 | 0 | 0 |
| Catawba Midway Marina | Port Clinton | 85 | 0 | 0 |
| Gem Trailer Court-west | Port Clinton | 84 | 0 | 0 |
| Orchard Isle Condo #2 | Port Clinton | 80 | 0 | 0 |
| Walleyes Rv Park | Port Clinton | 80 | 0 | 0 |
| West Catawba Marina | Port Clinton | 75 | 0 | 0 |
| Eberly's Pws | Port Clinton | 75 | 0 | 0 |
| Catawba Shores N Condo Pws | Port Clinton | 70 | 0 | 0 |
| Parcels Post Condo Assoc Pws | Port Clinton | 53 | 0 | 0 |
| Gem Trailer Court-east | Port Clinton | 50 | 0 | 0 |
| Island Airlines | Port Clinton | 50 | 0 | 0 |
| Lemarin Condo-well F | Port Clinton | 47 | 0 | 0 |
| Hidden Harbor Resort Inc | Port Clinton | 40 | 0 | 0 |
| Watering Hole Co., The | Port Clinton | 32 | 0 | 0 |
| Lemarin Condo-well G | Port Clinton | 32 | 0 | 0 |
| Lemarin Condo-well H | Port Clinton | 32 | 0 | 0 |
| Lemarin Condo-well E | Port Clinton | 32 | 0 | 0 |
| Le Marin Condos Marina | Port Clinton | 30 | 0 | 0 |
| Catawba Is. Club-marina | Port Clinton | 30 | 0 | 0 |
| Z'S BEER PORT PWS | Port Clinton | 27 | 0 | 0 |
| Harbor Island Associatio | Port Clinton | 26 | 0 | 0 |