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ERDDAP > info > cwb_water_quality

Title Sum-
Institution Dataset ID
   set  data   graph     Hawaii Clean Water Branch (CWB) Beach Water Quality Data    ?   F   I   M   background (external link) RSS Subscribe
State of Hawaii C...  ?

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL acknowledgement String The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST).
attribute NC_GLOBAL cdm_data_type String Point
attribute NC_GLOBAL comment String Some sampling sites have been discontinued and therefore do not contain recent measurements in this dataset.
attribute NC_GLOBAL Conventions String CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String cleanwaterbranch at
attribute NC_GLOBAL creator_institution String State of Hawaii Clean Water Branch (CWB)
attribute NC_GLOBAL creator_name String State of Hawaii Clean Water Branch (CWB)
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String (external link)
attribute NC_GLOBAL date_created String 2013-03-28
attribute NC_GLOBAL date_issued String 2013-03-28
attribute NC_GLOBAL date_metadata_modified String 2021-04-01
attribute NC_GLOBAL date_modified String 2013-03-28
attribute NC_GLOBAL defaultDataQuery String &time>=now-3months
attribute NC_GLOBAL defaultGraphQuery String longitude,latitude,enterococcus&time>=now-3months&.draw=markers
attribute NC_GLOBAL Easternmost_Easting double -154.8167
attribute NC_GLOBAL featureType String Point
attribute NC_GLOBAL geospatial_bounds String POLYGON ((18.914389 -159.777417, 22.225417 -159.777417, 22.225417 -154.816667, 18.914389 -154.816667, 18.914389 -159.777417))
attribute NC_GLOBAL geospatial_bounds_crs String EPSG:4326
attribute NC_GLOBAL geospatial_lat_max double 22.22542
attribute NC_GLOBAL geospatial_lat_min double 18.91439
attribute NC_GLOBAL geospatial_lat_resolution double 0.0
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -154.8167
attribute NC_GLOBAL geospatial_lon_min double -159.7774
attribute NC_GLOBAL geospatial_lon_resolution double 0.0
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double -0.3
attribute NC_GLOBAL geospatial_vertical_min double -0.3
attribute NC_GLOBAL geospatial_vertical_positive String up
attribute NC_GLOBAL geospatial_vertical_resolution double 0.0
attribute NC_GLOBAL geospatial_vertical_units String meters
attribute NC_GLOBAL history String 2013-03-29T00:00:00Z PacIOOS begins ingest from U.S. Water Quality Portal (WQP) and Hawaii Clean Water Branch (CWB) into PacIOOS ERDDAP data server.
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String State of Hawaii Clean Water Branch (CWB)
attribute NC_GLOBAL instrument String In Situ/Laboratory Instruments > Chemical Meters/Analyzers > > > Autoanalyzer, In Situ/Laboratory Instruments > Chemical Meters/Analyzers > > > pH Meters, In Situ/Laboratory Instruments > Conductivity Sensors, In Situ/Laboratory Instruments > Photon/Optical Detectors > > > Turbidity Meters, In Situ/Laboratory Instruments > Samplers > Bottles/Flasks/Jars, In Situ/Laboratory Instruments > Temperature/Humidity Sensors > > > Temperature Sensors
attribute NC_GLOBAL instrument_vocabulary String GCMD Instrument Keywords
attribute NC_GLOBAL ISO_Topic_Categories String climatologyMeteorologyAtmosphere, environment, health, oceans
attribute NC_GLOBAL keywords String Earth Science > Oceans > Ocean Chemistry > Oxygen, Earth Science > Oceans > Ocean Chemistry > pH, Earth Science > Oceans > Ocean Optics > Turbidity, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Salinity, Earth Science > Oceans > Water Quality > Ocean Contaminants
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute NC_GLOBAL locations String Continent > North America > United States Of America > Hawaii, Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands
attribute NC_GLOBAL locations_vocabulary String GCMD Location Keywords
attribute NC_GLOBAL metadata_link String (external link)
attribute NC_GLOBAL naming_authority String org.pacioos
attribute NC_GLOBAL Northernmost_Northing double 22.22542
attribute NC_GLOBAL platform String In Situ Land-based Platforms > Ocean Platform/Ocean Stations > Coastal Stations
attribute NC_GLOBAL platform_vocabulary String GCMD Platform Keywords
attribute NC_GLOBAL processing_level String Quality control measures described in the State of Hawaii Beach Monitoring Quality Assurance Project Plan (CWBMONQAPP002).
attribute NC_GLOBAL program String State of Hawaii Clean Water Branch (CWB)
attribute NC_GLOBAL project String State of Hawaii Beach Monitoring Quality Assurance
attribute NC_GLOBAL publisher_email String info at
attribute NC_GLOBAL publisher_institution String Pacific Islands Ocean Observing System (PacIOOS)
attribute NC_GLOBAL publisher_name String Pacific Islands Ocean Observing System (PacIOOS)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL publisher_url String (external link)
attribute NC_GLOBAL references String; (external link)
attribute NC_GLOBAL source String in situ measurements and water samples
attribute NC_GLOBAL sourceUrl String (source database)
attribute NC_GLOBAL Southernmost_Northing double 18.91439
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v39
attribute NC_GLOBAL subsetVariables String location_id, location_name
attribute NC_GLOBAL summary String Exposure to sewage contaminated recreational waters may cause gastrointestinal illnesses in swimmers. The State of Hawaii Department of Health (HIDOH) Clean Water Branch (CWB) monitors the waters of Hawaii's beaches for concentrations of Enterococcus, which acts as an indicator of pathogens. The CWB also uses Clostridium perfringens as a secondary tracer of sewage contamination. Results of this monitoring are evaluated using a decision rule to determine whether a beach is safe ("Compliant") or not safe (on "Alert") for swimming and other water contact activities. If a beach is found to be on "Alert" due to elevated indicator bacteria levels, the CWB issues public warnings and alerts and determines whether resampling of the area is necessary.

Under the U.S. BEACH Act, the State of Hawaii receives an annual grant to implement its beach monitoring program. This requires the State to conduct a monitoring and notification program that is consistent with performance criteria published by the U.S. Environmental Protection Agency (EPA) in 2002. In March 2010, the EPA approved amendments to the Hawaii Administrative Rules (HAR), Chapter 11-54, Water Quality Standards (CWB QAPrgP, HIDOH 2011, Appendix D), which revised the previous State Enterococcus criteria of a geometric mean (GM) of 7 colony-forming units (CFU) per 100 mL and a single sample maximum (SSM) of 100 CFU/100 mL to meet current EPA guidelines. The State of Hawaii now uses the EPA recommended Enterococcus GM and SSM for recreational waters consistent in the 1986 Ambient Water Quality Criteria for Bacteria. The criterion lists the GM and SSM for marine waters as 35 CFU/100 mL and 104 CFU/100 mL, respectively.

The CWB utilizes Clostridium perfringens as a secondary tracer in addition to the Enterococcus indicator to help distinguish between sewage and non-sewage sources of elevated Enterococcus levels in marine coastal waters. The reliability of Enterococcus as an indicator organism in tropical environments has been questioned. This issue was formally documented in the report, Tropical Water Quality Indicator Workshop (Fujioka and Byappanahalli, 2003).

One of the limitations of all available and EPA-approved test methods is that the sample must be incubated for about 24 hours. As a result, the public finds out today when they shouldn't have gone in the water yesterday. As a result, warning signs on the beach may or may not be reflective of actual water quality because they are based on tests performed one or more days ago.
attribute NC_GLOBAL time_coverage_start String 1973-06-04T21:00:00Z
attribute NC_GLOBAL title String Hawaii Clean Water Branch (CWB) Beach Water Quality Data
attribute NC_GLOBAL Westernmost_Easting double -159.7774
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.080756E8, NaN
attribute time axis String T
attribute time ioos_category String Time
attribute time long_name String Time
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable longitude   float  
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -159.77742, -154.81667
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable latitude   float  
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range float 18.914389, 22.225416
attribute latitude axis String Y
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable location_id   int  
attribute location_id actual_range int 152, 1253
attribute location_id ioos_category String Identifier
attribute location_id long_name String CWB identifier for this sampling location
variable location_name   String  
attribute location_name ioos_category String Location
attribute location_name long_name String location name
variable enterococcus   float  
attribute enterococcus colorBarMaximum double 100.0
attribute enterococcus colorBarMinimum double 0.0
attribute enterococcus comment String Colony Forming Units (CFU)
attribute enterococcus ioos_category String Pathogens
attribute enterococcus long_name String Enterococcus CFU
attribute enterococcus standard_name String number_concentration_of_enterococcus_in_sea_water
attribute enterococcus units String 1/(100-mL)
variable clostridium   float  
attribute clostridium colorBarMaximum double 15.0
attribute clostridium colorBarMinimum double 0.0
attribute clostridium comment String Colony Forming Units (CFU)
attribute clostridium ioos_category String Pathogens
attribute clostridium long_name String Clostridium perfringens CFU
attribute clostridium standard_name String number_concentration_of_clostridium_perfringens_in_sea_water
attribute clostridium units String 1/(100-mL)
variable water_temperature   float  
attribute water_temperature colorBarMaximum double 31.0
attribute water_temperature colorBarMinimum double 11.0
attribute water_temperature ioos_category String Temperature
attribute water_temperature long_name String water temperature
attribute water_temperature standard_name String sea_water_temperature
attribute water_temperature units String Celsius
variable salinity   float  
attribute salinity colorBarMaximum double 40.0
attribute salinity colorBarMinimum double 10.0
attribute salinity comment String Practical Salinity Units (PSU)
attribute salinity ioos_category String Salinity
attribute salinity long_name String salinity PSU
attribute salinity standard_name String sea_water_practical_salinity
attribute salinity units String 1
variable turbidity   float  
attribute turbidity colorBarMaximum double 10.0
attribute turbidity colorBarMinimum double 0.0
attribute turbidity comment String Nephelometric Turbidity Units (NTU)
attribute turbidity ioos_category String Optical Properties
attribute turbidity long_name String turbidity NTU
attribute turbidity standard_name String sea_water_turbidity
attribute turbidity units String 1
variable ph   float  
attribute ph colorBarMaximum double 9.0
attribute ph colorBarMinimum double 7.0
attribute ph ioos_category String Other
attribute ph long_name String pH
attribute ph standard_name String sea_water_ph_reported_on_total_scale
attribute ph units String 1
variable oxygen   float  
attribute oxygen colorBarMaximum double 10.0
attribute oxygen colorBarMinimum double 0.0
attribute oxygen ioos_category String Dissolved O2
attribute oxygen long_name String dissolved oxygen
attribute oxygen standard_name String mass_concentration_of_oxygen_in_sea_water
attribute oxygen units String mg/L
variable oxygen_saturation   float  
attribute oxygen_saturation colorBarMaximum double 100.0
attribute oxygen_saturation colorBarMinimum double 0.0
attribute oxygen_saturation ioos_category String Dissolved O2
attribute oxygen_saturation long_name String dissolved oxygen saturation
attribute oxygen_saturation standard_name String fractional_saturation_of_oxygen_in_sea_water
attribute oxygen_saturation units String %

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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