Arlington, Virginia: water and wastewater capital improvement projects
35 line items · $883M · starting 2026–2031 · 1 plan
Arlington's published capital plans list 35 water, sewer and wastewater line items with a combined planning budget of $883M, of which 30 items worth $750M sit in the wastewater and sewer departments. The largest single item is Re-Gen Phase III at $210M (2025–2029). The ten largest items are listed below; the full list with descriptions and page references is in Klarifi.
A capital improvement plan (CIP) is a city’s multi-year budget for building and replacing infrastructure. The water, sewer and wastewater sections list each project with its budget and the years it is funded, which makes them the earliest public signal that a plant, pump station or pipe network is about to be upgraded, usually two to four years before a contract is awarded.
The largest water and sewer projects in Arlington
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Re-Gen Phase III | Wastewater | Anaerobic digesters and biogas | $210M | 2025–2029 |
| 2 | Washington Aqueduct Capital | Wastewater | — | $146M | 2025–2034 |
| 3 | Finished Water Reliability & Interconnections | Wastewater | Stormwater and flood resilience | $95M | 2025–2031 |
| 4 | Water – Main Replacement Program | Water Distribution | Water mains and distribution | $79M | 2025–2034 |
| 5 | Regional Source Water Resiliency | Wastewater | Stormwater and flood resilience | $61M | 2034 |
| 6 | Sewer – Main Replacement Program | Sewer | Sewer rehabilitation and I&I | $32M | 2025–2034 |
| 7 | Sewer-Infiltration and Inflow | Sewer | Membranes and filtration | $28M | 2025–2034 |
| 8 | Sewer – Large Diameter Main Rehabilitation | Sewer | Sewer rehabilitation and I&I | $24M | 2025–2034 |
| 9 | WPCP Maintenance Capital | Water Distribution | Wastewater treatment plant upgrades | $22M | 2025–2034 |
| 10 | Blue Plains Capital Improvements | Wastewater | Wastewater treatment plant upgrades | $19M | 2025–2034 |
25 more line items in Arlington, with descriptions and contacts
Klarifi holds every Arlington line item with its description, the page it appears on and the source document, plus 3 verified contacts at the city’s treatment plants. Track new plans as they are adopted and compare with similar projects in other cities.
Planned spend by start year
Before 2026
$801M
29 items
2026
$2M
3 items
2028
$1M
1 items
2031
$18M
1 items
2032 and later
$61M
1 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 22 | $633M | 72% |
| Sewer | 8 | $117M | 13% |
| Water Supply | 1 | $2M | 0% |
| Water Distribution | 4 | $130M | 15% |
Project types in Arlington's plan
Wastewater treatment plants in Arlington
1 publicly owned treatment plant in Arlington with 4 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Arlington County Water Pollution Control Plant | 20.7 | VA0025143 | 4 |
Other Virginia cities with capital plans
Arlington capital plan questions
Sources and methodology
Budgets and years are as published in Arlington’s capital improvement plan or adopted budget. Klarifi extracts the water, sewer and wastewater line items from the published document, keeps the page reference for each one, and assigns a project type from the title and description with a keyword classifier. Figures are planning budgets, not awarded contracts, and can change when a plan is re-adopted.
Documents: CIP 2025–2034 (35 line items).
Data refreshed September 11, 2026.