Four sites were sampled on the the Dalyup River and two on Coobidge Creek; they are shown on the map above. Photographs are available for each site:
The temperature of the water at the sites ranged from 15.33 to 17.26°C.
The lowest recorded salinity was on the lowest site on the Dalyup River at 23.32ppt. The highest was at site COO02 at 45.16ppt. The remaining sites had a similar salinity ranging from 30.93 to 38.36ppt which are around seawater which is about 35ppt. Most of the sites had very acidic water with pH from 3.59 to 5.19. The exception was DAL01 with a pH of 8.04 which is slightly basic. Total phosphorus recorded in the water at each site was similar and low ranging from 8 to 38 µg/L. Total nitrogen levels were higher and ranged from 1100 to 3000 µg/L.