We found 182 public water systems that could serve the same population as Simpson Middle School (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Loudoun Water - Central System | Ashburn | 286,202 | 54 | 12 |
| Leesburg, Town Of | County of Loudoun | 61,540 | 44 | 0 |
| Purcellville, Town Of | County of Loudoun | 8,606 | 0 | 12 |
| Round Hill, Town Of | County of Loudoun | 3,495 | 0 | 15 |
| Hamilton, Town Of | County of Loudoun | 2,240 | 0 | 2 |
| Lovettsville, Town Of | County of Loudoun | 1,798 | 0 | 33 |
| Broad Run High School | County of Loudoun | 1,701 | 0 | 0 |
| Selma Estates | County of Loudoun | 1,509 | 0 | 0 |
| Elysian Heights | County of Loudoun | 1,061 | 0 | 0 |
| Evergreen Sportsplex | County of Loudoun | 1,001 | 0 | 2 |
| Loudoun Central Ll-b Carril | County of Loudoun | 999 | 0 | 0 |
| James M Wordsworth | County of Loudoun | 999 | 0 | 0 |
| Middleburg, Town Of | County of Loudoun | 803 | 0 | 34 |
| Claude Mr Pk-visit Ctr (prev Roy Geiger) | County of Loudoun | 800 | 0 | 6 |
| Franklin Park | County of Loudoun | 800 | 0 | 2 |
| Lenah Farms | County of Loudoun | 787 | 0 | 0 |
| Raspberry Falls Golf Course | County of Loudoun | 725 | 0 | 0 |
| Raspberry Falls Subdivision | County of Loudoun | 599 | 0 | 0 |
| Loudoun Golf & Country Club | County of Loudoun | 490 | 0 | 0 |
| Faith Bible Church Property Committee | County of Loudoun | 450 | 0 | 0 |
| Panaria Conference Center | County of Loudoun | 400 | 0 | 0 |
| Carradoc Hall Quality Inn | County of Loudoun | 384 | 0 | 0 |
| Beacon Hill-lcsa | County of Loudoun | 329 | 0 | 4 |
| Quality Inn Carradoc Hall | Loudoun | 325 | 0 | 0 |
| Foxcroft School | County of Loudoun | 300 | 0 | 15 |
| Broad Run High School Annex | Loudoun | 300 | 0 | 0 |
| Reserve At Rokeby Farm | County of Loudoun | 284 | 0 | 0 |
| Lucketts Elementary School | County of Loudoun | 269 | 0 | 2 |
| Waterford Elementary School | County of Loudoun | 260 | 0 | 4 |
| Galilee United Methodist Church | County of Loudoun | 260 | 0 | 0 |
| Hamilton Safety Center/harmony Hall | County of Loudoun | 250 | 0 | 0 |
| Paxton Child Development Center | County of Loudoun | 250 | 0 | 0 |
| Algonkian Reg. Park - Conference Center | County of Loudoun | 250 | 0 | 0 |
| North Spring Behavioral Healthcare | County of Loudoun | 225 | 0 | 30 |
| Main Street Truck Stop | County of Loudoun | 206 | 0 | 25 |
| Middleburg Academy | County of Loudoun | 200 | 0 | 4 |
| Arcola United Methodist Church | County of Loudoun | 200 | 0 | 58 |
| Algonkian Regional Park - Pool | County of Loudoun | 200 | 0 | 0 |
| Algonkian Reg. Park - Maintenance | County of Loudoun | 200 | 0 | 0 |
| Arcola Community Center | County of Loudoun | 200 | 0 | 0 |
| Potomac Baptist Church | Loudoun | 200 | 0 | 0 |
| Banneker Elementary School | County of Loudoun | 193 | 0 | 5 |
| Adesa Washington Dc | County of Loudoun | 178 | 0 | 36 |
| Kingdom Hall Of Jehovah Witnesses | County of Loudoun | 175 | 0 | 0 |
| Ed Potts | County of Loudoun | 175 | 0 | 0 |
| Bluemont Community Center | County of Loudoun | 168 | 0 | 7 |
| Middleburg Community Center | County of Loudoun | 150 | 0 | 2 |
| Camp Highroad | County of Loudoun | 150 | 0 | 27 |
| Trump National Golf Club, Washington, Dc | County of Loudoun | 150 | 0 | 0 |
| Algonkian Reg. Park - Comfort Station | County of Loudoun | 150 | 0 | 0 |
| Rehau Incorporated | County of Loudoun | 140 | 0 | 0 |
| Aldie Vfd | Loudoun | 140 | 0 | 0 |
| Lincoln Elementary School | County of Loudoun | 137 | 0 | 1 |
| Hillsboro Elementary School | County of Loudoun | 136 | 0 | 1 |
| Whitehall Associates Lc | County of Loudoun | 125 | 0 | 22 |
| Old 690 Brewery | County of Loudoun | 115 | 0 | 0 |
| Winnie The Pooh Preschool | County of Loudoun | 110 | 0 | 0 |
| Aldie Elementary School | County of Loudoun | 106 | 0 | 0 |
| Saint Francis Desales Catholic Church | County of Loudoun | 103 | 0 | 0 |
| Middleburg Training Center | County of Loudoun | 100 | 0 | 0 |
| H. Miley | County of Loudoun | 100 | 0 | 0 |
| Welbourne | County of Loudoun | 100 | 0 | 0 |
| WORSHIP CENTER | Leesburg | 100 | 0 | 0 |
| Neersville Fire & Rescue | County of Loudoun | 100 | 0 | 0 |
| Stephen Mcwhorter | Loudoun | 100 | 0 | 0 |
| Stephen Mcwhorter | County of Loudoun | 100 | 0 | 0 |
| Sully Exxon | Loudoun | 100 | 0 | 0 |
| Columbia Gas - F. Bell-aux. Bldg. | County of Loudoun | 100 | 0 | 0 |
| Ebenezer United Methodist Church | County of Loudoun | 100 | 0 | 0 |
| Loud. Field Center (glaydin) | Loudoun | 100 | 0 | 0 |
| Potomac Farms | County of Loudoun | 100 | 0 | 0 |
| John Stanford | Loudoun | 90 | 0 | 0 |
| Hillsboro, Town Of | County of Loudoun | 88 | 0 | 0 |
| Believers Baptist Church | Loudoun | 85 | 0 | 0 |
| Skills Usa | County of Loudoun | 81 | 0 | 0 |
| Hiway Mhc Llc | County of Loudoun | 80 | 0 | 0 |
| Pleasant Valley Umc | County of Loudoun | 80 | 0 | 0 |
| Sterling Ruritan | County of Loudoun | 75 | 0 | 0 |
| Waterford Texaco | Loudoun | 75 | 0 | 0 |
| Bud Greenfield | County of Loudoun | 75 | 0 | 0 |
| Church Of The Nazarene | County of Loudoun | 75 | 0 | 0 |
| Aldie Water Company | County of Loudoun | 70 | 0 | 0 |
| Lucketts Community Center | County of Loudoun | 70 | 0 | 0 |
| Algonkian Reg. Park - Cottages | County of Loudoun | 66 | 0 | 0 |
| Echo | County of Loudoun | 65 | 0 | 0 |
| Creeks Edge Winery | County of Loudoun | 64 | 0 | 0 |
| Tart Lumber Company, Inc. | County of Loudoun | 60 | 0 | 0 |
| One Stop Trailer Park | County of Loudoun | 60 | 0 | 0 |
| The Ag District Center | County of Loudoun | 58 | 0 | 0 |
| Cerritos Pupuseria | County of Loudoun | 58 | 0 | 0 |
| Village Montessori School At Bluemont | County of Loudoun | 55 | 0 | 0 |
| Loudoun Valley Nazarene | County of Loudoun | 50 | 0 | 0 |
| Briar Patch B&b | County of Loudoun | 50 | 0 | 0 |
| Banshee Reeks Park | County of Loudoun | 50 | 0 | 0 |
| Morven Park Inter Equest Center | County of Loudoun | 50 | 0 | 0 |
| Patowmack Farm | County of Loudoun | 50 | 0 | 0 |
| Quattro Goomba's Winery/brewery | County of Loudoun | 50 | 0 | 0 |
| Skillman Property | County of Loudoun | 50 | 0 | 0 |
| Vfw-post 1177 | County of Loudoun | 50 | 0 | 0 |
| Wheatland Farms | County of Loudoun | 50 | 0 | 0 |
| Lovettsville Game Protect Asso | Loudoun | 50 | 0 | 0 |
| Ray Walters | County of Loudoun | 50 | 0 | 0 |
| Tom & Moms Eataway-t.roberts | Loudoun | 50 | 0 | 0 |
| Springwood At Leesburg | Loudoun | 50 | 0 | 0 |
| Springdale | County of Loudoun | 50 | 0 | 0 |
| Dominion Skating Center | Loudoun | 50 | 0 | 0 |
| Creighton Farms | County of Loudoun | 49 | 0 | 0 |
| Trowbridge Steel Company | County of Loudoun | 45 | 0 | 0 |
| Us Noaa | County of Loudoun | 45 | 0 | 0 |
| National Recreation & Park Assoc. Hq | County of Loudoun | 45 | 0 | 0 |
| Sugarland Texaco | County of Loudoun | 45 | 0 | 0 |
| Congregation Sha`are Shalom | County of Loudoun | 42 | 0 | 0 |
| Pev`s Paintball | County of Loudoun | 40 | 0 | 0 |
| Philomont Community Center | County of Loudoun | 40 | 0 | 0 |
| Kashway Foods | Loudoun | 40 | 0 | 0 |
| Bethel Presbyterian Church | County of Loudoun | 40 | 0 | 0 |
| Boulder Crest Retreat | County of Loudoun | 35 | 0 | 0 |
| Grafton Ihn - Leesburg | County of Loudoun | 35 | 0 | 0 |
| At & T -richard Hooper | County of Loudoun | 35 | 0 | 0 |
| S&m Warehouse | County of Loudoun | 35 | 0 | 0 |
| Herndon Junction Amoco | County of Loudoun | 35 | 0 | 0 |
| Helen Nardick | County of Loudoun | 34 | 0 | 0 |
| Oatlands Plantation | County of Loudoun | 30 | 0 | 0 |
| Grandale Farm | County of Loudoun | 30 | 0 | 0 |
| Twisted Oaks Ii | Loudoun | 30 | 0 | 0 |
| The Huddle | Loudoun | 30 | 0 | 0 |
| North Fork Schl Of Equitation | Loudoun | 30 | 0 | 0 |
| Lcdpr - Mickey Gordon Park | County of Loudoun | 30 | 0 | 0 |
| Dulles-sterling Motel | Loudoun | 30 | 0 | 0 |
| Springwood At Leesburg | Loudoun | 30 | 0 | 0 |
| Pastrami Scotts | Loudoun | 30 | 0 | 0 |
| Wdf Mansion | County of Loudoun | 26 | 0 | 0 |
| Meadowkirk, Inc. At Delta Farm | County of Loudoun | 25 | 0 | 0 |
| Beautiful South, The | County of Loudoun | 25 | 0 | 0 |
| Temple Hall Farm Park | County of Loudoun | 25 | 0 | 0 |
| Camp Potomac Woods | County of Loudoun | 25 | 0 | 0 |
| Brambleton Golf Course | County of Loudoun | 25 | 0 | 0 |
| Barnhouse Brewery | County of Loudoun | 25 | 0 | 0 |
| Raspberry Plain Manor | County of Loudoun | 25 | 0 | 0 |
| Panda Stonewall | County of Loudoun | 25 | 0 | 0 |
| Leesburg Animal Park | County of Loudoun | 25 | 0 | 0 |
| Roots 657 | County of Loudoun | 25 | 0 | 0 |
| Loudoun County Animal Shelter | County of Loudoun | 25 | 0 | 0 |
| Claude Moore Park Caretaker's House | County of Loudoun | 25 | 0 | 0 |
| Goodstone Inn, The | County of Loudoun | 25 | 0 | 0 |
| Wdf Comfort Station | County of Loudoun | 25 | 0 | 0 |
| Dirt Farm Brewery | County of Loudoun | 25 | 0 | 0 |
| Black Hops Farm | County of Loudoun | 25 | 0 | 0 |
| One-stop | County of Loudoun | 25 | 0 | 0 |
| Hllsboro Community Center | County of Loudoun | 25 | 0 | 0 |
| Woodland Retirement Home | County of Loudoun | 25 | 0 | 0 |
| Virginia Paving | County of Loudoun | 25 | 0 | 0 |
| Waterford Inn | Loudoun | 25 | 0 | 0 |
| Weona Villa Motel | County of Loudoun | 25 | 0 | 0 |
| B O Dotson | County of Loudoun | 25 | 0 | 0 |
| Lucketts Mini Mart | Loudoun | 25 | 0 | 0 |
| Wade Drive Limited Partnership | County of Loudoun | 25 | 0 | 0 |
| Twisted Oaks Condos Phase 1 | County of Loudoun | 25 | 0 | 0 |
| Libby Carswell C/o Young Group | Sterling | 25 | 0 | 0 |
| Rentals Unlimited | County of Loudoun | 25 | 0 | 0 |
| Loudoun County Fire/rescue | Arcola | 25 | 0 | 0 |
| Boyd Montessori School | County of Loudoun | 25 | 0 | 0 |
| Ashburn Vfd | County of Loudoun | 25 | 0 | 0 |
| Ashburn Masonic Lodge | County of Loudoun | 25 | 0 | 0 |
| Dobson Building | County of Loudoun | 25 | 0 | 0 |
| Sterling Community Center Annex | County of Loudoun | 25 | 0 | 0 |
| Claude Moore Park - Kiosk | County of Loudoun | 25 | 0 | 0 |
| Cornerstone Bed And Breakfast | Loudoun | 25 | 0 | 0 |
| Dominion Paving | Loudoun | 25 | 0 | 0 |
| Fairfax Autoparts | County of Loudoun | 25 | 0 | 0 |
| Monford | County of Loudoun | 25 | 0 | 0 |
| Goose Creek Golf Club | County of Loudoun | 25 | 0 | 0 |
| Tripp Ii - Whiting | County of Loudoun | 25 | 0 | 0 |
| Hill High Country Store | County of Loudoun | 25 | 0 | 0 |
| Mt Defiance Cidery | County of Loudoun | 25 | 0 | 0 |
| Philomont Vfd - Cawthron | County of Loudoun | 25 | 0 | 0 |
| Poor House B & B | County of Loudoun | 25 | 0 | 0 |
| Longhorn Restaurant | Loudoun | 20 | 0 | 0 |
| Martha's House | Loudoun | 15 | 0 | 0 |
| Columbia Gas - Bell - Lng Bldg | County of Loudoun | 10 | 0 | 0 |
| Mountain View Elementary School | County of Loudoun | 0 | 0 | 0 |
| United Rentals | County of Loudoun | 0 | 0 | 0 |