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USGS Current Conditions for Montana
Parameter codes are 5-digit codes used to identify the constituent measured and the units of measure. Some parameter code definitions include information about the methods used to measure the constituent, but this level of information is not currently consistent in the naming system. There are two types of parameter codes:
|Parameter Code||Parameter Definition|
|00910||Calcium, water, unfiltered, milligrams per liter as calcium carbonate|
|00915||Calcium, water, filtered, milligrams per liter|
|00916||Calcium, water, unfiltered, recoverable, milligrams per liter|
|91051||Calcium, water, filtered, micrograms per liter|