We found 82 public water systems in Norman county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Ada | Ada | 1,709 | 0 | 6 |
| Twin Valley | Twin Valley | 900 | 0 | 1 |
| Halstad | Halstad | 597 | 0 | 3 |
| Hendrum | Hendrum | 307 | 0 | 4 |
| Gary | Gary | 204 | 0 | 1 |
| Shelly | Shelly | 191 | 0 | 1 |
| Augustana Lutheran Church | County of Norman | 130 | 0 | 0 |
| Bethany Lutheran Church | County of Norman | 125 | 0 | 0 |
| Flom Cafe | County of Norman | 121 | 0 | 0 |
| Ness Lutheran Church | County of Norman | 120 | 0 | 0 |
| Augustana Lutheran Church | County of Norman | 120 | 0 | 0 |
| The Christian Outpost | County of Norman | 110 | 0 | 0 |
| Sundal Lutheran Church | County of Norman | 100 | 0 | 0 |
| St. John's Lutheran Church | County of Norman | 100 | 0 | 0 |
| St. Petri's Lutheran Church | County of Norman | 100 | 0 | 0 |
| St. John's Lutheran Church | County of Norman | 100 | 0 | 0 |
| Borup | Borup | 91 | 0 | 0 |
| Perley | Perley | 90 | 0 | 0 |
| Jevnaker Lutheran Church | County of Norman | 90 | 0 | 0 |
| First English Lutheran Church | County of Norman | 75 | 0 | 0 |
| Faeberg Church | County of Norman | 60 | 0 | 0 |
| Heart Of The Valley Golf Course | County of Norman | 35 | 0 | 0 |
| East Marsh River Lutheran Church | County of Norman | 35 | 0 | 0 |
| Wild Rice Lutheran Church | County of Norman | 32 | 0 | 0 |
| Aspelund Lutheran Church | County of Norman | 28 | 0 | 0 |
| Flom Township | County of Norman | 26 | 0 | 0 |
| First Last Chance Bar | County of Norman | 25 | 0 | 0 |
| St Olaf Church | County of Norman | 25 | 0 | 0 |
| Faith Flour And Feed Mill | County of Norman | 25 | 0 | 0 |
| Martys Drive In-theater | County of Norman | 25 | 0 | 0 |
| Natwick Home | County of Norman | 25 | 0 | 0 |
| Twin Valley Park | County of Norman | 25 | 0 | 0 |
| Riverside Park | County of Norman | 25 | 0 | 0 |
| ZION LUTHERAN CHURCH | County of Norman | 25 | 0 | 0 |
| Fossum Township Hall | County of Norman | 25 | 0 | 0 |
| Olson's Repair | County of Norman | 25 | 0 | 0 |
| American Legion Post 505 | County of Norman | 25 | 0 | 0 |
| Dawer Meat Processing | County of Norman | 25 | 0 | 0 |
| Johnsons Food & Locker | County of Norman | 25 | 0 | 0 |
| Fossum Township Hall | County of Norman | 25 | 0 | 0 |
| Anderson Trailer Court Ii | County of Norman | 25 | 0 | 0 |
| Merry Lane Mobile Home Park | County of Norman | 25 | 0 | 0 |
| Twin Valley Mobile Home Park | County of Norman | 25 | 0 | 0 |
| Landstad Lutheran Church | County of Norman | 25 | 0 | 0 |
| Flom Co-op Oil Company | Flom | 25 | 0 | 0 |
| Syre Fertilizer Company | Ulen | 25 | 0 | 0 |
| Stone Hill Regional Park | County of Norman | 25 | 0 | 0 |
| Gary High School | County of Norman | 25 | 0 | 0 |
| Gary State Bank | County of Norman | 25 | 0 | 0 |
| Gary Cenex | County of Norman | 25 | 0 | 0 |
| Lucys Cafe | County of Norman | 25 | 0 | 0 |
| Gary Elevator Co | County of Norman | 25 | 0 | 0 |
| Tom's Repair | County of Norman | 25 | 0 | 0 |
| Norman County Implement | County of Norman | 25 | 0 | 0 |
| Hendrum Community Park | County of Norman | 25 | 0 | 0 |
| Titan Machinery (ada) | County of Norman | 25 | 0 | 0 |
| Faaberg Lutheran Church | County of Norman | 25 | 0 | 0 |
| Natwick Home | County of Norman | 25 | 0 | 0 |
| Gary Legion Hall | County of Norman | 25 | 0 | 0 |
| Agricultural Society | County of Norman | 25 | 0 | 0 |
| Woodland Acres Trl Court | County of Norman | 25 | 0 | 0 |
| Gary Ag Service | County of Norman | 25 | 0 | 0 |
| Gary Cashway Lumber | County of Norman | 25 | 0 | 0 |
| Gary Lutheran Church | County of Norman | 25 | 0 | 0 |
| Morton Buildings | County of Norman | 25 | 0 | 0 |
| Brad Ragan, Inc | County of Norman | 25 | 0 | 0 |
| Ada-twin Valley Airport | County of Norman | 25 | 0 | 0 |
| Halstad Elevator Company | County of Norman | 25 | 0 | 0 |
| Gary City Hall | County of Norman | 25 | 0 | 0 |
| Norman County Garage | County of Norman | 25 | 0 | 0 |
| Creamery Mini Mall | County of Norman | 25 | 0 | 0 |
| St Johns Lutheran Church | County of Norman | 25 | 0 | 0 |
| Sundal Lutheran Church | County of Norman | 25 | 0 | 0 |
| Flom Co-op Oil Assn | County of Norman | 25 | 0 | 0 |
| Bethania Lutheran Church | County of Norman | 25 | 0 | 0 |
| Gary Pines Wayside Rest Area | County of Norman | 25 | 0 | 0 |
| Red River Supper Club | County of Norman | 25 | 0 | 0 |
| Midwestern Gas Trans Co | County of Norman | 25 | 0 | 0 |
| Agsco Company | County of Norman | 25 | 0 | 0 |
| Schumacher Ok Tire Store | County of Norman | 25 | 0 | 0 |
| Great Plains Supply Co | County of Norman | 25 | 0 | 0 |
| Vfm | County of Norman | 0 | 0 | 0 |