Allowable values of ND_MeasUnit element

Code	Label	Definition
m	Secchi Depth Transparency	Secchi depth (in meters)
mg/l N	Total Nitrogen	N
mg/l NO2	Nitrite	NO2
mg/l NO3	Nitrate	NO3
mg/l O2	Biochemical Oxygen Demand in 5 days, Biochemical Oxygen Demand in 7 days, Dissolved Oxygen	BOD5, BOD7, DO
mg/l P	Total Phosphorus	P
mg/l PO4	Orthophosphate	PO4
µg/l	Chlorophyll-a, Dissolved inorganic Nitrogen, Dissolved inorganic Phosphorus	Chl-a, DIN, DIP

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