We found 83 public water systems that could serve the same population as Terry Trojan Water District (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Black Hawk City Of | Black Hawk | 15,167 | 57 | 37 |
| Black Hawk Water User District | Black Hawk | 3,750 | 0 | 53 |
| Lead | Lead | 3,292 | 0 | 4 |
| Deadwood | Deadwood | 1,270 | 0 | 12 |
| Northdale Sanitary District | Black Hawk, Piedmont | 1,075 | 0 | 4 |
| Bear Country Usa | Black Hawk, Rapid City | 1,021 | 0 | 79 |
| Palmer Gulch Lodge/mt Rushmore Koa | Black Hawk, Hill City | 850 | 0 | 4 |
| Flying J Travel Plaza | Black Hawk, Rapid City | 560 | 0 | 51 |
| Terry Trojan Water District | Black Hawk, Deadwood, Lead | 400 | 0 | 147 |
| Pine Hills Park | Black Hawk, Whitewood | 300 | 0 | 90 |
| Stagebarn Sanitary District | Black Hawk, Piedmont, Rapid City | 293 | 0 | 24 |
| Heartland Campground | Black Hawk, Hermosa | 270 | 0 | 11 |
| Trail West Sanitary District | Black Hawk, Piedmont | 260 | 0 | 0 |
| Woodland Hills | Black Hawk | 255 | 0 | 27 |
| A&w Drive Inn | Deadwood | 250 | 0 | 0 |
| Valley View Water Company | Black Hawk, Rapid City | 248 | 0 | 27 |
| Medicine Mountain Scout Camp | Black Hawk, Rapid City | 200 | 0 | 13 |
| Wharf Resources Water System | Lead | 200 | 0 | 31 |
| Rendezvous Ranch | Black Hawk | 195 | 0 | 51 |
| Edelweiss Mountain Improvement Assoc | Black Hawk, Rapid City | 172 | 0 | 195 |
| Pine Cliff Estates | Black Hawk, Rapid City | 170 | 0 | 51 |
| Cimarron Park | Black Hawk, Cedaredge | 160 | 0 | 123 |
| Black Hills Chairlift | Black Hawk, Lead | 150 | 0 | 6 |
| Bj's Hermosa | Black Hawk | 150 | 0 | 9 |
| Viewfield Rural Water System | Black Hawk, New Underwood | 150 | 0 | 16 |
| Cheyenne Crossing Store | Lead | 150 | 0 | 7 |
| Steel Wheel Campground And Convenien | Black Hawk, Deadwood | 150 | 0 | 0 |
| Spring Creek Acres | Black Hawk, Hot Springs | 145 | 0 | 16 |
| High Meadows Water Company | Black Hawk | 140 | 0 | 11 |
| Golden Valley Water Company | Black Hawk, Rapid City | 138 | 0 | 13 |
| Midland Heights | Black Hawk, Piedmont | 130 | 0 | 11 |
| Rushmore Ranch Estates | Black Hawk | 128 | 0 | 31 |
| Deer Mountain/union Resort | Lead, Rapid City | 125 | 0 | 84 |
| East Ridge Acres | Black Hawk, Piedmont | 115 | 0 | 0 |
| D&j Mobile Home Park | Black Hawk, Spearfish | 112 | 0 | 0 |
| Dry Creek Estates | Black Hawk | 105 | 0 | 0 |
| Peaceful Pines Ii | Black Hawk | 102 | 0 | 0 |
| Spearfish Canyon Resort Llc | Lead, Spearfish | 100 | 0 | 0 |
| Lewie's Saloon And Eatery | Lead | 100 | 0 | 0 |
| Boulder Canyon Country Club | Lead, Sturgis | 100 | 0 | 0 |
| Golden Meadows | Black Hawk | 96 | 0 | 0 |
| Heartland Country Ranchettes | Black Hawk, Hermosa | 95 | 0 | 0 |
| Whispering Willows | Black Hawk, Piedmont | 90 | 0 | 0 |
| Fish-n-fry Campground | Black Hawk, Deadwood | 90 | 0 | 0 |
| Quaal Water Association | Black Hawk | 83 | 0 | 0 |
| Sugar Shack | Deadwood | 75 | 0 | 0 |
| Crooked Oaks Canyon Homeowners | Black Hawk, Piedmont | 75 | 0 | 0 |
| Oak Mountain Country Estates | Black Hawk, Deadwood | 70 | 0 | 0 |
| Thrall Mtn. Property Owners Associat | Black Hawk, Rapid City | 70 | 0 | 0 |
| Autumn Meadows Sanitary District | Black Hawk, Piedmont | 68 | 0 | 0 |
| Wickiup Village Cabins Llc | Lead | 65 | 0 | 0 |
| Tomahawk Country Club-clubhouse | Deadwood, Lead | 60 | 0 | 0 |
| Shirt Tail Gulch Development | Deadwood, Lead | 60 | 0 | 0 |
| High Meadows Ranchettes | Black Hawk, Rapid City | 58 | 0 | 0 |
| Paradise Water Company Llc | Lead, Sioux Falls | 55 | 0 | 0 |
| Owanka Rural Water System | Black Hawk, Owanka | 52 | 0 | 0 |
| Wild Bill's Campground | Deadwood | 50 | 0 | 0 |
| Canyon Springs Preserve Hoa | Black Hawk, Rapid City | 50 | 0 | 0 |
| Trailshead Lodge | Lead | 50 | 0 | 0 |
| Jsboondocks Llc | Custer, Deadwood | 50 | 0 | 0 |
| Hidden Valley Campground | Black Hawk, Deadwood | 50 | 0 | 0 |
| Roughlock Falls Picnic Area | Lead | 50 | 0 | 0 |
| Ramada Inn | Black Hawk | 50 | 0 | 0 |
| Gilded Mountain Homeowners Associati | Lead, Spearfish | 45 | 0 | 0 |
| Three Flags Rv Park | Black Hawk | 45 | 0 | 0 |
| 76 Ranch Estates | Lead, Sturgis | 40 | 0 | 0 |
| Valhalla Addition | Black Hawk, Sturgis | 38 | 0 | 0 |
| High Sheridan Ranch | Black Hawk, Rapid City | 33 | 0 | 0 |
| Mystic Hills Hideaway East | Deadwood | 30 | 0 | 0 |
| Norris Peak Water Users Assoc | Black Hawk, Rapid City | 30 | 0 | 0 |
| The Niche Sanitary District | Black Hawk, Sturgis | 30 | 0 | 0 |
| Eagle Water Company | Lead | 25 | 0 | 0 |
| Meadow Crest Homeowners Association | Deadwood, Spearfish | 25 | 0 | 0 |
| Pillar Peak | Deadwood, Spearfish | 25 | 0 | 0 |
| Kamp Kinship 2 | Deadwood | 25 | 0 | 0 |
| Kamp Kinship 1 | Deadwood | 25 | 0 | 0 |
| Pactola Water Association | Black Hawk, Rapid City | 25 | 0 | 0 |
| Brohm Mining Corporation | Deadwood | 25 | 0 | 0 |
| Trout Haven | Deadwood | 25 | 0 | 0 |
| Mystic Hills Hideaway West | Deadwood | 25 | 0 | 0 |
| Meadow Restaurant | Deadwood | 25 | 0 | 0 |
| Tomahawk Country Club-6th Hole | Deadwood | 20 | 0 | 0 |
| Lead-deadwood Sanitary District | Deadwood | 0 | 0 | 0 |