Water Quality Test Results

Ocean Monitoring


Humboldt County is funded by the U.S. Environmental Protection Agency Beach Environmental Assessment and Coastal Health Act (BEACH Act) to monitor for the presence of bacteria in ocean water areas. Water samples are taken near creek mouths that deliver stormwater into the ocean.

Current Results


No beaches are currently posted.
Locations Resample Sample  Data 
Total
Coliform
Exceeds
Limit
E.Coli Exceeds
Limit
Enterococcus Exceeds
Limit
Clam Beach County Park No 4/18/2017 3,448 No 122 No 31 No
Luffenholtz Creek No 4/18/2017 689 No <10 No 10 No
Moonstone Beach No 4/18/2017 1,022 No 74
No <10 No
North Mad River Mouth No 4/18/2017 1,259 No 86 No
41 No
Trinidad State Park / Mill Creek No 4/18/2017 288 No <10 No <10 No
Previous results are available for download.


Legend


All units are in are in MPN/100 ml. MPN = "most probable number".
State water quality standards for bacteria in recreational waters are not to exceed:
Total coliform = 10,000 MPN/100ml
E. coli (a fecal coliform) = 400 MPN/100 ml
Enterococcus (E. faecalis) = 104 MPN/100 ml
*Fecal coliform to total coliform ratio exceeds 0.1, and the total coliform count exceeds 1,000 MPN