Lagoon systems: wastewater treatment plants in Virginia
42 plants · 19% of the state · 78 MGD reported by 39 plants
Klarifi identifies 42 publicly owned wastewater treatment plants with lagoon systems in Virginia, 19% of the 223 plants in the state (78 MGD reported by 39 plants). The largest is Noman M Cole Jr Pollution Control Plant in Lorton at 34.8 MGD.
Lagoon systems treat wastewater in large earthen ponds over weeks of retention time, with or without mechanical aeration. They serve thousands of small towns because they are cheap to run, but they struggle with ammonia and nutrient limits, fill with sludge over decades and are the plants most often converted or upgraded when a permit is renewed.
The largest lagoons in Virginia
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Noman M Cole Jr Pollution Control Plant | Lorton | 34.8 | VAL025364 | Dec 2030 | 0 |
| 2 | H L Mooney Water Reclamation Facility | Woodbridge | 14.17 | VA0025101 | Oct 2030 | 0 |
| 3 | City Of Danville Northside WWTP | Danville | 5.03 | VAL060593 | Dec 2030 | 5 |
| 4 | Martinsville STP | Ridgeway | 4.11 | VAL025305 | Dec 2030 | 26 |
| 5 | Middle River Regional WWTP | Verona | 3.03 | VA0064793 | Feb 2031 | 0 |
| 6 | Culpeper Wastewater Treatment Plant | Culpeper | 2.9 | VAL061590 | Dec 2030 | 0 |
| 7 | Christiansburg Town Of | Christiansburg | 2.8 | VAL061751 | Dec 2030 | 1 |
| 8 | Fredericksburg Wastewater Treatment Facility | Fredericksburg | 2.33 | VAL025127 | Dec 2030 | 12 |
| 9 | Big Stone Gap Regional WWTP | Big Stone Gap | 1.71 | VAL020940 | Dec 2030 | 4 |
| 10 | Altavista Town - Wastewater Treatment Plant | Altavista | 1.7 | VA0020451 | May 2031 | 0 |
| 11 | Lawrenceville STP | Lawrenceville | 0.74 | VA0020354 | Aug 2030 | 0 |
| 12 | Orange Virginia Town Of Sewage | Orange | 0.73 | VAL021385 | Dec 2030 | 1 |
| 13 | Parham Landing WWTP | West Point | 0.57 | VA0088331 | Sep 2030 | 2 |
| 14 | Tazewell Wastewater Plant, Tow | Tazewell | 0.48 | VAL026298 | Dec 2030 | 0 |
| 15 | Town Of Tappahannock Wastewater Treatment Plant | Tappahannock | 0.42 | VA0071471 | May 2028 | 0 |
| 16 | Town Of Chase City WWTP | Chase City | 0.25 | VA0076881 | Dec 2028 | 18 |
| 17 | Gretna Town - Sewage Treatment Plant | Gretna | 0.23 | VA0063843 | Aug 2029 | 24 |
| 18 | Cape Charles Town - Wastewater Treatment Plant | Cape Charles | 0.2 | VA0021288 | Jan 2030 | 2 |
| 19 | Marshall Wastewater Treatment Plant | Marshall | 0.16 | VA0031763 | Aug 2028 | 0 |
| 20 | Kenbridge STP | Kenbridge | 0.16 | VA0026239 | Feb 2028 | 13 |
| 21 | Craig New Castle Psa Wwt Plant | New Castle | 0.15 | VA0064599 | Feb 2029 | 8 |
| 22 | Boykins Town - Waste Water Treatment Plant | Boykins | 0.15 | VA0026417 | May 2031 | 0 |
| 23 | Boydton WWTP | Boydton | 0.15 | VA0026247 | May 2031 | 0 |
| 24 | Clarksville WWTP | Clarksville | 0.14 | VA0020168 | Feb 2030 | 5 |
| 25 | Grottoes WWTP | Grottoes | 0.12 | VA0065374 | Sep 2030 | 6 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Virginia
Lagoon systems in other states
Lagoon systems in Virginia: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026.