LAGOSUS Chemical and physical data
| Variable name | Variable description | Units |
| lagoslakeid | unique lake identifier developed by LAGOSUS | NULL |
| eventid_epi | unique event identifier that is a combination of programid, lakeid, and date for each sampling event in LAGOS | NULL |
| site_legacyid | unique sample site identifier provided by the source of the data; this is not standardardized and each source dataset has its own system | NULL |
| program_id | unique integer program identifier assigned by LAGOSUS | NULL |
| program_name | name of sampling program that collected the data | NULL |
| event_date | date, as YYYY-MM-DD, when the lake was sampled by the source program | YYYY-MM-DD |
| site_id | unique sample site identifier created by the LAGOSUS | NULL |
| site_lat_decdeg | latitude of the sample site | Decimal Degrees |
| site_lon_decdeg | longitude of the sample site | Decimal Degrees |
| program_type | type of program that provided the data | NULL |
| alk_ueql | alkalinity, microequivalents per liter | Microequivalents per Liter |
| alk_qualifier_legacyflag | alkalinity data flags from the source program | NULL |
| alk_qualifier_legacyflagdesc | alkalinity data flag descriptions from the source program | NULL |
| alk_censorcode | the LAGOSUS assigned censor code for alkalinity that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| alk_detectionlimit_legacyvalue | alkalinity detection limit used by the source program | NULL |
| alk_detectionlimit_legacyunit | alkalinity detection limit unit used by the source program | NULL |
| alk_method | alkalinity analytical procedure, from a standards body if available | NULL |
| ca_mgl | calcium, dissolved, milligrams per liter | Milligrams per Liter |
| ca_qualifier_legacyflag | calcium, dissolved data flags from the source program | NULL |
| ca_qualifier_legacyflagdesc | calcium, dissolved data flag descriptions from the source program | NULL |
| ca_censorcode | the LAGOSUS assigned censor code for calcium, dissolved that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| ca_detectionlimit_legacyvalue | calcium, dissolved detection limit used by the source program | NULL |
| ca_detectionlimit_legacyunit | calcium, dissolved detection limit unit used by the source program | NULL |
| ca_method | calcium, dissolved analytical procedure, from a standards body if available | NULL |
| cl_mgl | chloride, dissolved, milligrams per liter | Milligrams per Liter |
| cl_qualifier_legacyflag | chloride, dissolved data flags from the source program | NULL |
| cl_qualifier_legacyflagdesc | chloride, dissolved data flag descriptions from the source program | NULL |
| cl_censorcode | the LAGOSUS assigned censor code for chloride, dissolved that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| cl_detectionlimit_legacyvalue | chloride, dissolved detection limit used by the source program | NULL |
| cl_detectionlimit_legacyunit | chloride, dissolved detection limit unit used by the source program | NULL |
| cl_method | chloride, dissolved analytical procedure, from a standards body if available | NULL |
| spcond_uscm | specific conductance, microsiemens per cm at 25C | Microsiemens per Centimeter |
| spcond_qualifier_legacyflag | specific conductance data flags from the source program | NULL |
| spcond_qualifier_legacyflagdesc | specific conductance data flag descriptions from the source program | NULL |
| spcond_censorcode | the LAGOSUS assigned censor code for specific conductance that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| spcond_detectionlimit_legacyvalue | specific conductance detection limit used by the source program | NULL |
| spcond_detectionlimit_legacyunit | specific conductance detection limit unit used by the source program | NULL |
| spcond_method | specific conductance analytical procedure, from a standards body if available | NULL |
| do_mgl | oxygen, dissolved, milligrams per liter | Milligrams per Liter |
| do_qualifier_legacyflag | oxygen, dissolved data flags from the source program | NULL |
| do_qualifier_legacyflagdesc | oxygen, dissolved data flag descriptions from the source program | NULL |
| do_censorcode | the LAGOSUS assigned censor code for dissolved oxygen that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| do_detectionlimit_legacyvalue | oxygen, dissolved detection limit used by the source program | NULL |
| do_detectionlimit_legacyunit | oxygen, dissolved detection limit unit used by the source program | NULL |
| do_method | oxygen, dissolved analytical procedure, from a standards body if available | NULL |
| mg_mgl | magnesium, dissolved, milligrams per liter | Milligrams per Liter |
| mg_qualifier_legacyflag | magnesium, dissolved data flags from the source program | NULL |
| mg_qualifier_legacyflagdesc | magnesium, dissolved data flag descriptions from the source program | NULL |
| mg_censorcode | the LAGOSUS assigned censor code for magnesium, dissolved that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| mg_detectionlimit_legacyvalue | magnesium, dissolved detection limit used by the source program | NULL |
| mg_detectionlimit_legacyunit | magnesium, dissolved detection limit unit used by the source program | NULL |
| mg_method | magnesium, dissolved analytical procedure, from a standards body if available | NULL |
| ph_eq | pH, equilibrated | NULL |
| ph_eq_qualifier_legacyflag | pH, equilibrated data flags from the source program | NULL |
| ph_eq_qualifier_legacyflagdesc | pH, equilibrated data flag descriptions from the source program | NULL |
| ph_eq_censorcode | the LAGOSUS assigned censor code for ph_eq that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| ph_eq_detectionlimit_legacyvalue | pH, equilibrated detection limit used by the source program | NULL |
| ph_eq_detectionlimit_legacyunit | pH, equilibrated detection limit unit used by the source program | NULL |
| ph_eq_method | pH, equilibrated analytical procedure, from a standards body if available | NULL |
| ph_field | pH, field or closed | NULL |
| ph_field_qualifier_legacyflag | pH, field or closed data flags from the source program | NULL |
| ph_field_qualifier_legacyflagdesc | pH, field or closed data flag descriptions from the source program | NULL |
| ph_field_censorcode | the LAGOSUS assigned censor code for ph_field that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| ph_field_detectionlimit_legacyvalue | pH, field or closed detection limit used by the source program | NULL |
| ph_field_detectionlimit_legacyunit | pH, field or closed detection limit unit used by the source program | NULL |
| ph_field_method | pH, field or closed analytical procedure, from a standards body if available | NULL |
| salinity_mgl | salinity, milligrams per liter | Milligrams per Liter |
| salinity_qualifier_legacyflag | salinity data flags from the source program | NULL |
| salinity_qualifier_legacyflagdesc | salinity data flag descriptions from the source program | NULL |
| salinity_censorcode | the LAGOSUS assigned censor code for salinity that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| salinity_detectionlimit_legacyvalue | salinity detection limit used by the source program | NULL |
| salinity_detectionlimit_legacyunit | salinity detection limit unit used by the source program | NULL |
| salinity_method | salinity analytical procedure, from a standards body if available | NULL |
| so4_mgl | sulfate, dissolved, milligrams per liter as SO4 | Milligrams per Liter |
| so4_qualifier_legacyflag | sulfate, dissolved data flags from the source program | NULL |
| so4_qualifier_legacyflagdesc | sulfate, dissolved data flag descriptions from the source program | NULL |
| so4_censorcode | the LAGOSUS assigned censor code for sulfate, dissolved that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| so4_detectionlimit_legacyvalue | sulfate, dissolved detection limit used by the source program | NULL |
| so4_detectionlimit_legacyunit | sulfate, dissolved detection limit unit used by the source program | NULL |
| so4_method | sulfate, dissolved analytical procedure, from a standards body if available | NULL |
| temp_degc | temperature, degrees Celsius | Degrees Celcius |
| temp_qualifier_legacyflag | temperature data flags from the source program | NULL |
| temp_qualifier_legacyflagdesc | temperature data flag descriptions from the source program | NULL |
| temp_censorcode | the LAGOSUS assigned censor code for temperature that indicates whether the value is censored depending on information from the source program data flags, the detection limit, or the value itself | NULL |
| temp_detectionlimit_legacyvalue | temperature detection limit used by the source program | NULL |
| temp_detectionlimit_legacyunit | temperature detection limit unit used by the source program | NULL |
| temp_method | temperature analytical procedure, from a standards body if available | NULL |