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 storm water into the ocean.

Current Results
The following beach is posted: Luffenholtz Beach/Creek.

Water quality test results by location and date.
Locations Resample Sample  Date 
E.Coli Exceeds
Enterococcus Exceeds
North Mad River Mouth No 9/19/2023 110 No 31 No 63 No
Clam Beach/Strawberry Creek No 9/19/2023 131 No 10 No <10 No
Moonstone Beach/Little River No 9/19/2023 98 No 10 No <10 No
Luffenholtz Beach/Creek No 9/19/2023 2,723 No 373 Yes 158 Yes
Trinidad State Park/Mill Creek No 9/19/2023 74 No 10 No 10 No

Previous results are available for download (XLS).


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

NOWCAST Predictions

NOWCAST Predictive Modeling now includes Luffenholtz Beach. Visit beachreportcard.org and enter "Luffenholtz" into the "search for your favorite beach" form field.

For more information, visit beachreportcard.org.