We found 22 public water systems that could serve the same population as Ozaukee Congreg Church & Parish House (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Grafton Waterworks | Grafton | 11,490 | 58 | 53 |
| Ozaukee Congreg Fellowship Hall | Grafton | 401 | 0 | 9 |
| Cornerstone Church | Grafton | 253 | 0 | 0 |
| Vineyard Community Church | Grafton | 162 | 0 | 0 |
| Pioneer Grafton Mobile Hm Pk | Grafton | 150 | 0 | 6 |
| Edgewater Golf Club | Grafton | 102 | 0 | 0 |
| St Johns Lutheran Church | Grafton | 98 | 0 | 0 |
| New Frontiers Learning Center Llc | Grafton | 95 | 0 | 0 |
| Ozaukee Daycare Center - Ulao 2 | Grafton | 85 | 0 | 0 |
| Little Red School House | Grafton | 75 | 0 | 0 |
| Ozaukee County Humane Society | Grafton | 56 | 0 | 0 |
| Advanced Manufacturing Technologies Inc | Grafton | 55 | 0 | 0 |
| Carpets Galore | Grafton | 54 | 0 | 0 |
| Ghost Town Tavern & Restaurant | Grafton | 50 | 0 | 0 |
| Fire Ridge Golf Club | Grafton | 50 | 0 | 0 |
| Stonecroft Condominium Assn | Grafton | 50 | 0 | 0 |
| The Family Farm | Grafton | 45 | 0 | 0 |
| Seek Inc | Grafton | 37 | 0 | 0 |
| Dds-sc | Grafton | 32 | 0 | 0 |
| Welcome Mobile Mart | Grafton | 26 | 0 | 0 |
| Lime Kiln Park Area 4 | Grafton | 25 | 0 | 0 |
| Ozaukee Daycare Center - Ulao | Grafton | 0 | 0 | 0 |