Wilmington does not operate a residential purple-pipe recycled water system, but Delaware permits limited reclaimed-water reuse for irrigation and industrial purposes through DNREC under specific permit conditions.
Unlike water-stressed western cities, Wilmington has no separate purple-pipe distribution system delivering reclaimed water to homes. Delaware's water reuse framework, administered by DNREC under Title 7, allows treated wastewater for irrigation of golf courses, ball fields, and certain industrial cooling applications under permit. Residential use of recycled water is uncommon and generally limited to greywater systems regulated by the state plumbing code. Rainwater harvesting for non-potable uses is allowed and encouraged. Wilmington's wastewater treatment outflow generally discharges to the Delaware River rather than being recycled locally.
Unpermitted reclaimed-water connections, cross-connections to potable lines, or unsafe greywater plumbing violate state plumbing and DNREC permit rules.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Wilmington, DE
Residential swimming pools in Wilmington require a building permit from the Department of Licenses and Inspections and must comply with the Delaware State Bu...
Wilmington, DE
Delaware does not preempt local tiny-home rules, and Wilmington's City Code Chapter 48 (Zoning) treats dwellings under the standard residential district bulk...
Wilmington, DE
Carports in Wilmington are accessory structures regulated under City Code Chapter 48 (Zoning) and require a building permit from the Department of Licenses a...
Wilmington, DE
Wilmington follows Delaware HB 80 (2017) informal sanctuary protections. The Wilmington Police Department limits civil immigration cooperation with ICE; crim...
Wilmington, DE
Delaware's Healthy Delaware Families Act (DE 19 §3702A) created statewide paid family and medical leave, fully effective 2026. Wilmington cannot create a sep...
Wilmington, DE
Delaware preempts local minimum-wage rules. The state minimum wage rose from $13.25 (2025) to $15.00 effective 2026 under DE Title 19 §902, applying uniforml...
See how Wilmington's recycled water rules rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.