We found 56 public water systems in Union county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Luttrell-blaine-corryton U.d. | Luttrell | 9,031 | 0 | 9 |
| Maynardville Water Dept | Maynardville | 7,485 | 0 | 30 |
| Chuck Swann Recreation Area | County of Union | 2,200 | 0 | 0 |
| Hickory Star Resort | County of Union | 1,000 | 0 | 0 |
| Big Ridge School | County of Union | 420 | 0 | 0 |
| Big Ridge State Park | County of Union | 400 | 0 | 0 |
| Old Hickory Water Company-union County | County of Union | 339 | 0 | 94 |
| Sharps Chapel School | County of Union | 320 | 0 | 0 |
| Big Ridge School | County of Union | 290 | 0 | 0 |
| Seymours 33 Bridge Marina Rec | County of Union | 200 | 0 | 0 |
| Alder Springs Baptist Church | County of Union | 200 | 0 | 0 |
| Andersonville Boat Dock | County of Union | 200 | 0 | 0 |
| Tanasi Girl Scout Camp | County of Union | 200 | 0 | 0 |
| Loyston Point P.u.a.,tva | County of Union | 150 | 0 | 1 |
| Lost Creek Campground | County of Union | 140 | 0 | 0 |
| Beech Island P.u.a. -tva | County of Union | 132 | 0 | 0 |
| Lakeview Dock Campground | County of Union | 125 | 0 | 0 |
| Lead Mine Bend Water Assoc. | Sharps Chapel | 111 | 0 | 0 |
| Global Stone Tenn Luttrell | County of Union | 111 | 0 | 0 |
| Tanasi Gs Camp, Gs Counci S Appalachains | County of Union | 100 | 0 | 0 |
| Bill Bradshaw | County of Union | 100 | 0 | 0 |
| Chuck Swan Wildlife Area | County of Union | 100 | 0 | 0 |
| Buck Island Camp | County of Union | 100 | 0 | 0 |
| Community Baptist Church | County of Union | 100 | 0 | 0 |
| Union County Boat Dock | County of Union | 100 | 0 | 0 |
| Ailor Trailer Park | County of Union | 65 | 0 | 0 |
| Welch Mobile Home Park | County of Union | 65 | 0 | 0 |
| Dive Spruce Motel And Rest. | County of Union | 60 | 0 | 0 |
| House Restaurant | County of Union | 60 | 0 | 0 |
| Lakeview Lodge Rest & Boat Dk | County of Union | 60 | 0 | 0 |
| Macedonia Baptist Church | County of Union | 60 | 0 | 0 |
| Lay's Mobile Home Park | County of Union | 60 | 0 | 0 |
| Allor Mobile Home Park | County of Union | 56 | 0 | 0 |
| Nave Hill Church | County of Union | 55 | 0 | 0 |
| Hickory Valley Head Start | County of Union | 54 | 0 | 0 |
| Beach Island Marina | County of Union | 50 | 0 | 0 |
| Blue Springs Dock | County of Union | 50 | 0 | 0 |
| Lake View Restaurant | County of Union | 50 | 0 | 0 |
| Straight Branch Boat Dock | County of Union | 50 | 0 | 0 |
| Valley Grove Baptist Church | County of Union | 50 | 0 | 0 |
| Alder Springs Baptist Church | County of Union | 50 | 0 | 0 |
| Pat's Diner | County of Union | 40 | 0 | 0 |
| Blue Spruce Rest & Motel | County of Union | 38 | 0 | 0 |
| Sequoyah Lounge | County of Union | 35 | 0 | 0 |
| Idlewood Lounge | County of Union | 35 | 0 | 0 |
| Weekend Cottages | County of Union | 30 | 0 | 0 |
| Welch Mobile Home Park | County of Union | 29 | 0 | 0 |
| Beard Valley Mobile Home Park | County of Union | 25 | 0 | 0 |
| Family Recreation Center | County of Union | 25 | 0 | 0 |
| Hinds Creek Baptist Church | County of Union | 25 | 0 | 0 |
| W & R Lakeview Dock, Inc. | County of Union | 25 | 0 | 0 |
| Chesney Head Start | County of Union | 25 | 0 | 0 |
| Valley Grove Church | County of Union | 25 | 0 | 0 |
| Bull Run School | County of Union | 25 | 0 | 0 |
| Church Of Christ | County of Union | 25 | 0 | 0 |
| Rose Hill Baptist Church | County of Union | 25 | 0 | 0 |