COLUMN_NAME LABEL UNITS AMMONIA_N Ammonia-Nitrogen (or Total Ammoniacal Nitrogen) mg N/L CHLA Chlorophyll a ug/L CHLORIDE Chloride mg/L COLOR True color APHA PT-CO COND Specific conductance at 25 degrees C uS/cm @ 25C DOC Dissolved Organic Carbon mg/L NITRATE_N Nitrate mg N/L NITRATE_NITRITE_N Nitrate+Nitrite mg N/L NTL Total nitrogen mg/L PH pH measured at laboratory Std. Units PTL Total posphorus ug/L SULFATE Sulfate mg/L TURB Turbidity NTU AMMONIA_N_DATE_ANALYZED Date sample analyzed for analyte: ammonia AMMONIA_N_DILUTION_FACTOR Dilution factor used in chlorophyll calculation for Ammonia as N AMMONIA_N_HOLDING_TIME Time from sampling to analysis (days): ammonia AMMONIA_N_MDL Method detection limit of ammonia AMMONIA_N_NARS_FLAG NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte: ammonia AMMONIA_N_QA_FLAG QA flag assigned by lab: ammonia AMMONIA_N_RESULT Analyte value: ammonia AMMONIA_N_RL Reporting limit of ammonia AMMONIA_N_UNITS Units of measurement: ammonia CHLA_DATE_ANALYZED Date sample analyzed for analyte: chlorophyll-a CHLA_DILUTION_FACTOR CHLA_EXTRACT chlorophyll-a amount in extract by volume (ug/L) CHLA_EXTRACT_UNITS Units of measurement: chlorophyll extract by volume CHLA_HOLDING_TIME Time from sampling to analysis (days): chlorophyll-a CHLA_MDL Method detection limit of chlorophyll-a CHLA_NARS_FLAG Chlorophyll-a - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte CHLA_QA_FLAG QA flag associated with sample for Chlorophyll a CHLA_RESULT Analyte value: chlorophyll-a CHLA_RESULT_UNITS Units for Chlorophyll a CHLA_RL Reporting limit of analyte: chlorophyll-a CHLA_VOLUME_ADJUST CHLA_VOLUME_FILTERED Volume filtered for chlorophyll-a sample CHLORIDE_DATE_ANALYZED Date sample analyzed for analyte: chloride CHLORIDE_DILUTION_FACTOR Dilution factor used in chlorophyll calculation for Chloride CHLORIDE_HOLDING_TIME Time from sampling to analysis (days): chloride CHLORIDE_MDL Method detection limit of chloride CHLORIDE_NARS_FLAG Chloride - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte CHLORIDE_QA_FLAG QA flag assigned by lab: chloride CHLORIDE_RESULT Analyte value: chloride CHLORIDE_RL Reporting limit of analyte: chloride CHLORIDE_UNITS Units of measurement: chloride COLOR_DATE_ANALYZED Date sample analyzed for analyte: color COLOR_HOLDING_TIME Time from sampling to analysis (days): color COLOR_NARS_FLAG "NARS FLAG. ND = Nondetect; H = holding time issue; S = shipping issue; L = Less than reporting limit but above MDL; Q = other quality issue. See NARS_COMMENT, NR = No lab result for analyte for Color" COLOR_QA_FLAG QA flag assigned by lab: color COLOR_RESULT Analyte value: color COLOR_UNITS Units of measurement: color COND_DATE_ANALYZED Date sample analyzed for analyte: conductivity COND_HOLDING_TIME Time from sampling to analysis (days): conductivity COND_MDL Method detection limit of conductivity COND_NARS_FLAG Conductivity - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte COND_QA_FLAG QA flag assigned by lab: conductivity COND_RESULT Analyte value: conductivity COND_RL Reporting limit of analyte: conductivity COND_UNITS Units of measurement: conductivity DATE_COL Date the site visit occurred DOC_DATE_ANALYZED Date sample analyzed for analyte: dissolved organic carbon DOC_DILUTION_FACTOR Dilution factor used in chlorophyll calculation for Dissolved Organic Carbon DOC_HOLDING_TIME Time from sampling to analysis (days): dissolved organic carbon DOC_MDL Method detection limit of dissolved organic carbon DOC_NARS_FLAG Dissolved organic carbon - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte DOC_QA_FLAG QA flag assigned by lab: dissolved organic carbon DOC_RESULT Analyte value: dissolved organic carbon DOC_RL Reporting limit of analyte: Dissolved organic carbon DOC_UNITS Units of measurement: dissolved organic carbon LAB Code for laboratory used to analyze sample MATRIX Material used for analysis NITRATE_N_DATE_ANALYZED Date sample analyzed for analyte: nitrate NITRATE_N_HOLDING_TIME Time from sampling to analysis (days): nitrate NITRATE_N_MDL Method detection limit of nitrate NITRATE_N_NARS_FLAG "NARS FLAG. ND = Nondetect; H = holding time issue; S = shipping issue; L = Less than reporting limit but above MDL; Q = other quality issue. See NARS_COMMENT, NR = No lab result for analyte for Nitrate as N" NITRATE_N_RESULT Analyte value: nitrate NITRATE_N_RL Reporting limit of nitrate NITRATE_N_UNITS Units of measurement: nitrate NITRATE_NITRITE_N_DATE_ANALYZED Date of sample analysis for Nitrate+Nitrite as N NITRATE_NITRITE_N_DILUTION_FACTOR Dilution factor used in chlorophyll calculation for Nitrate+Nitrite as N NITRATE_NITRITE_N_HOLDING_TIME Sample holding time for Nitrate+Nitrite as N NITRATE_NITRITE_N_MDL Method detection limit of nitrate-nitrite NITRATE_NITRITE_N_NARS_FLAG NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte: nitrate-nitrite NITRATE_NITRITE_N_QA_FLAG QA flag associated with sample for Nitrate+Nitrite as N NITRATE_NITRITE_N_RESULT Analyte value: nitrate-nitrite NITRATE_NITRITE_N_RL Reporting limit of analyte: nitrate-nitrite NITRATE_NITRITE_N_UNITS Units of measurement: nitrate-nitrite NTL_DATE_ANALYZED Date of sample analysis for Total Nitrogen NTL_HOLDING_TIME Sample holding time for Total Nitrogen NTL_MDL Method detection limit of total nitrogen NTL_NARS_FLAG Total nitrogen - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte NTL_QA_FLAG QA flag associated with sample for Total Nitrogen NTL_RESULT Total Nitrogen NTL_RL Reporting limit of analyte: Total nitrogen NTL_UNITS Units - Total nitrogen PH_DATE_ANALYZED Date sample analyzed for analyte: pH PH_HOLDING_TIME Time from sampling to analysis (days): pH PH_NARS_FLAG pH - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte PH_QA_FLAG QA flag assigned by lab: pH PH_RESULT Analyte value: pH PH_UNITS Units of measurement: pH PTL_DATE_ANALYZED Date of sample analysis for Total Phosphorus PTL_HOLDING_TIME Sample holding time for Total Phosphorus PTL_MDL Method detection limit of total phosphorus PTL_NARS_FLAG Total phosphorus - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte PTL_QA_FLAG QA flag associated with sample for Total Phosphorus PTL_RESULT Total Phosphorus PTL_RL Reporting limit of analyte: Total phosphorus PTL_UNITS Units - Total phosphorus PUBLICATION_DATE Date of data file publication SAM_CODE Sample code (Regular/Lab duplicate/Lab split) SITE_ID "Unique Site ID for the study and design cycle sampled. Preferred form is NWCnn_MM-xxxxx where nn is current cycle year (11, 16, 21), MM is two letter state code, and xxxxx is between 10001 and 99999. No missing or \blank\"" values allowed.""" SULFATE_DATE_ANALYZED Date sample analyzed for analyte: sulfate SULFATE_DILUTION_FACTOR Dilution factor used in chlorophyll calculation for Sulfate SULFATE_HOLDING_TIME Time from sampling to analysis (days): sulfate SULFATE_MDL Method detection limit of sulfate SULFATE_NARS_FLAG Sulfate - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte SULFATE_QA_FLAG QA flag assigned by lab: sulfate SULFATE_RESULT Analyte value: sulfate SULFATE_RL Reporting limit of analyte: sulfate SULFATE_UNITS Units of measurement: sulfate TURB_DATE_ANALYZED Date sample analyzed for analyte: turbidity TURB_HOLDING_TIME Time from sampling to analysis (days): turbidity TURB_MDL Method detection limit of turbidity TURB_NARS_FLAG Turbidity - NARS flag: ND = Nondetect; L = Less than reporting limit but above MDL; Q = other quality issue; NR = No lab result for analyte TURB_QA_FLAG QA flag assigned by lab: turbidity TURB_RESULT Analyte value: turbidity TURB_RL Reporting limit of analyte: Turbidity TURB_UNITS Units of measurement: turbidity UID Unique site visit ID UNIQUE_ID "Unique site ID based on location that does not depend on year sampled or any other factor. Form is NWC_ss_nnnnn where ss state and nnnnn is number that starts at 10001. No missing or \blank\"" values allowed. NA""" VISIT_NO Sequential visit in each year PSTL_CODE "State two letter postal code for site sampled. 50 state postal codes plus AS, MP, GU, PR, VI for American Samoa, Commonwealth of Northern Marianas, Guam, Puerto Rico and Virgin Islands. No missing or \blank\"" values allowed."""