Drinking Water Compliance OS

WILMINGTON, DE · New Castle County

WILMINGTON WATER DEPARTMENT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Delaware’s official records. Always confirm current status with Delaware before making decisions based on this information.

System facts

System ID (PWSID)
DE0000663
System type
Community Water System
Population served
107,976
Service connections
37,915
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

Violation history

  • Monitoring, Source Water (LT2)

    Cryptosporidium

    May 1, 2015 – May 31, 2015

    Resolved
  • Monitoring, Source Water (LT2)

    Long Term 2 Enhanced Surface Water Treatment Rule

    May 1, 2015 – September 29, 2015

    Resolved
  • Monitoring, Source Water (LT2)

    Long Term 2 Enhanced Surface Water Treatment Rule

    April 1, 2015 – September 29, 2015

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Contact

OH, CHRISTIANA

302-576-3017

WILMINGTON, DE 19801