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ERDDAP > info > maui_water_quality

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Institution Dataset ID
     data   graph     Maui Citizen Science Coastal Water Quality Data    ?   F   I   M   background (external link) RSS Subscribe
Coral Reef Allian...  ?

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). This dataset is managed through an online repository, the Coral Reef Monitoring Data Portal (, developed and coordinated by the Coral Reef Alliance (CORAL) and its partners with funding provided by the Hawaii Tourism Authority (HTA) and the National Oceanic and Atmospheric Administration (NOAA). Data collection is coordinated by the Hawaii Division of Aquatic Resources (DAR), the Hawaiian Islands Humpback Whale National Marine Sanctuary (HIHWNMS), Aquanimity Now, the Digital Bus, Save Honolua Coalition, Project S.E.A.-Link, and other local organizations and agencies. Data are publicly distributed by the Pacific Islands Ocean Observing System (PacIOOS).
attribute NC_GLOBAL cdm_data_type String Point
attribute NC_GLOBAL comment String Only a subset of sampling sites with consistent location names and frequent measurements have been ingested from the Coral Reef Monitoring Data Portal.
attribute NC_GLOBAL contributor_name String John Maurer
attribute NC_GLOBAL contributor_role String distributor
attribute NC_GLOBAL Conventions String CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String monitoring at
attribute NC_GLOBAL creator_institution String Coral Reef Alliance (CORAL)
attribute NC_GLOBAL creator_name String Coral Reef Alliance (CORAL)
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String (external link)
attribute NC_GLOBAL date_created String 2014-04-09
attribute NC_GLOBAL date_issued String 2014-04-09
attribute NC_GLOBAL date_metadata_modified String 2014-04-09
attribute NC_GLOBAL date_modified String 2014-04-09
attribute NC_GLOBAL defaultDataQuery String &time>=now-1year
attribute NC_GLOBAL defaultGraphQuery String longitude,latitude,sea_water_temperature&time>=now-1year&.draw=markers
attribute NC_GLOBAL Easternmost_Easting double -156.4375
attribute NC_GLOBAL featureType String Point
attribute NC_GLOBAL geospatial_bounds String POLYGON ((20.5241 -156.7172, 21.0736 -156.7172, 21.0736 -155.9193, 20.5241 -155.9193, 20.5241 -156.7172))
attribute NC_GLOBAL geospatial_bounds_crs String EPSG:4326
attribute NC_GLOBAL geospatial_lat_max double 20.9995
attribute NC_GLOBAL geospatial_lat_min double 20.61845
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 -156.4375
attribute NC_GLOBAL geospatial_lon_min double -156.6664
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 0.0
attribute NC_GLOBAL geospatial_vertical_min double 0.0
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 PacIOOS began ingesting from Coral Reef Alliance (CORAL) Coral Reef Monitoring Data Portal into PacIOOS ERDDAP data server (04/2014)
attribute NC_GLOBAL id String maui_water_quality
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String Coral Reef Alliance (CORAL)
attribute NC_GLOBAL instrument String 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 keyword_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL keywords String Earth Science > Atmosphere > Atmospheric Temperature > Surface Air Temperature, 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, Earth Science > Oceans > Water Quality > Ocean Contaminants
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 > Maui
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 20.9995
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 Some quality control during automated ingest from Coral Reef Monitoring Data Portal to check for reasonable data ranges and units of measure for some measurement variables.
attribute NC_GLOBAL program String Coral Reef Alliance (CORAL)
attribute NC_GLOBAL project String Coral Reef Alliance (CORAL)
attribute NC_GLOBAL publisher_email String info at
attribute NC_GLOBAL publisher_institution String University of Hawaii
attribute NC_GLOBAL publisher_name String Pacific Islands Ocean Observing System (PacIOOS)
attribute NC_GLOBAL publisher_type String group
attribute NC_GLOBAL publisher_url String (external link)
attribute NC_GLOBAL reference 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 20.61845
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v39
attribute NC_GLOBAL summary String A network of citizen science volunteers periodically monitors water quality at several beaches across the island of Maui in the State of Hawaii. This community-based monitoring effort provides valuable data for resource management purposes. Informed volunteer networks can serve as a community's "eyes and ears" and will often provide the first indications of changes to a system. In addition to the value of early detection, it is important to maintain ongoing monitoring efforts to compile data and document resource conditions.

In addition to water temperature, salinity, turbidity (water clarity), and pH, sampling sites are also monitored for harmful bacteria levels of Enterococcus. This indicator bacteria has been correlated with the presence of human pathogens (disease-causing organisms) and therefore with human illnesses such as gastroenteritis, diarrhea, and various infections in epidemiological studies. As such, it is commonly measured in beach water quality monitoring programs. For reference, the U.S. Environmental Protection Agency (EPA) 1986 Ambient Water Quality Criteria for Bacteria recommends that a water quality alert is posted if either: (a.) the latest water sample exceeds 104 CFU/100 mL of Enterococcus, or (b.) the geometric mean of the past 30 days of water samples exceeds 35 CFU/100 mL. One of the limitations of all available and EPA-approved test methods is that the sample must be incubated for about 24 hours.

Data are managed through an online repository, the Coral Reef Monitoring Data Portal (, developed and coordinated by the Coral Reef Alliance (CORAL) and its partners with funding provided by the Hawaii Tourism Authority (HTA) and the National Oceanic and Atmospheric Administration (NOAA). Data collection is coordinated by the Hawaii Division of Aquatic Resources (DAR), the Hawaiian Islands Humpback Whale National Marine Sanctuary (HIHWNMS), Aquanimity Now, the Digital Bus, Save Honolua Coalition, Project S.E.A.-Link, and other local organizations and agencies. Data are publicly distributed by the Pacific Islands Ocean Observing System (PacIOOS).
attribute NC_GLOBAL time_coverage_start String 2010-01-29T21:14:00Z
attribute NC_GLOBAL title String Maui Citizen Science Coastal Water Quality Data
attribute NC_GLOBAL Westernmost_Easting double -156.6664
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.26479964E9, 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 -156.6664, -156.4375
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 20.61845, 20.9995
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   String  
attribute location_id ioos_category String Identifier
attribute location_id long_name String 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 report_id   int  
attribute report_id ioos_category String Identifier
attribute report_id long_name String Coral Reef Monitoring Data Portal survey report identifier
variable number_concentration_of_enterococcus_in_sea_water   float  
attribute number_concentration_of_enterococcus_in_sea_water colorBarMaximum double 100.0
attribute number_concentration_of_enterococcus_in_sea_water colorBarMinimum double 0.0
attribute number_concentration_of_enterococcus_in_sea_water ioos_category String Pathogens
attribute number_concentration_of_enterococcus_in_sea_water long_name String Enterococcus
attribute number_concentration_of_enterococcus_in_sea_water standard_name String number_concentration_of_enterococcus_in_sea_water
attribute number_concentration_of_enterococcus_in_sea_water units String CFU/100-milliliters
variable air_temperature   float  
attribute air_temperature colorBarMaximum double 31.0
attribute air_temperature colorBarMinimum double 21.0
attribute air_temperature ioos_category String Temperature
attribute air_temperature long_name String air temperature
attribute air_temperature standard_name String air_temperature
attribute air_temperature units String Celsius
variable sea_water_temperature   float  
attribute sea_water_temperature colorBarMaximum double 31.0
attribute sea_water_temperature colorBarMinimum double 11.0
attribute sea_water_temperature ioos_category String Temperature
attribute sea_water_temperature long_name String water temperature
attribute sea_water_temperature standard_name String sea_water_temperature
attribute sea_water_temperature units String Celsius
variable sea_water_salinity   float  
attribute sea_water_salinity colorBarMaximum double 40.0
attribute sea_water_salinity colorBarMinimum double 10.0
attribute sea_water_salinity ioos_category String Salinity
attribute sea_water_salinity long_name String salinity
attribute sea_water_salinity standard_name String sea_water_salinity
attribute sea_water_salinity units String PSU
variable sea_water_turbidity   float  
attribute sea_water_turbidity colorBarMaximum double 10.0
attribute sea_water_turbidity colorBarMinimum double 0.0
attribute sea_water_turbidity ioos_category String Optical Properties
attribute sea_water_turbidity long_name String turbidity
attribute sea_water_turbidity standard_name String sea_water_turbidity
attribute sea_water_turbidity units String NTU
variable sea_water_ph_reported_on_total_scale   float  
attribute sea_water_ph_reported_on_total_scale colorBarMaximum double 9.0
attribute sea_water_ph_reported_on_total_scale colorBarMinimum double 7.0
attribute sea_water_ph_reported_on_total_scale ioos_category String Other
attribute sea_water_ph_reported_on_total_scale long_name String pH
attribute sea_water_ph_reported_on_total_scale standard_name String sea_water_ph_reported_on_total_scale
attribute sea_water_ph_reported_on_total_scale units String pH

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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