The Channel Islands Harbor is the fifth largest harbor in the state of California and is a waterfront resort, recreation, and dining marketplace. The horse-shoe shaped harbor contains 166 acres of water surrounded by 126 acres of land and supports more than 2,500 vessels, four yacht clubs, and nine full-service marinas. The harbor waters connect to four residential communities including Seabridge, Westport, Mandalay Bay and Harbour Island.
In June of 2018, the harbor experienced a water degradation event, resulting in brown, murky water and some marine life death. The City quickly mobilized, forming a response team and setting up a hotline number for residents to report issues and concerns. City staff began performing daily water quality testing in 26 locations for dissolved oxygen, temperature, salinity and pH. Additionally, bacteria testing has been completed and all results have come back within state standards and there is no threat to public health and safety. Water quality testing has continued and those results can be found on the interactive map below.
Water Sampling Data
Water Quality Reports
Remote Sensor Reading
Continuous water monitoring in the affected areas is of high importance to the City. To provide transparent data, the City will regularly post readings from four (4) remote sensors that are currently located throughout the Channel Islands Harbor. These data are downloaded from each sensor on a weekly basis. Each graph displayed indicates the location of the sensor, i.e. Mandalay West (station 20), and shows both the Dissolved Oxygen and Chlorophyll readings (vertical axes) for the designated time frame (bottom axis.) Dissolved Oxygen and Chlorophyll are being monitored to assist with the anticipation of any additional degradation in the water which could include a potential algal bloom. Please be assured that the data will be regularly reviewed by Aquatic Bioassay & Consulting, who will notify the City of any emerging issues indicated by the water quality monitoring. The public will be apprised on any issues discovered through the monitoring process by the City.
Due to scheduled maintenance, the four (4) remote sensors will be removed from the Oxnard Waterways in Mandalay, Seabridge, and Westport for routine maintenance. Dissolved Oxygen (DO) levels in the area have stabilized to acceptable levels. Hand monitoring will occur as needed.
Comprehensive Remote Sensor Data: 3-26-20 to 7-8-20
Weekly Remote Sensor Data
Ongoing Projects and Upcoming Events
November 13, 2018 City Council Meeting
October 22, 2018 Channel Islands Task Force Meeting
October 2, 2018 City Council Meeting
July 11, 2018 Channel Islands Harbor Task Force Meeting
July 5, 2018 Special City Council Meeting
Report a Problem
Emergency Response Hotline: 805-200-5291