TABLE 1.

Use of nutrient measures in state numeric nutrient criteria for rivers and streams

State/Territory	Status/Coverage	Basis for WQ Criteria
		TN	TP	NO3−	NO2−	NOx	NH4+	PO4a	TINb	TKNc	SRP
Am. Samoa	statewide	✦	✦
Arizona	partial	✦	✦					✦
California	partial	✦	✦	✦				✦	✦	✦
Florida	partial	✦	✦			✦d
Guam	statewide			✦				✦
Hawaiie	statewide	✦	✦			✦	✦
Minnesota	statewide		✦
Montana	partial	✦	✦
N✦ Marianas Is✦	statewide	✦	✦					✦
Nevada	partial	✦	✦	✦	✦			✦	✦
New Jersey	statewide		✦	✦
New Mexico	partial		✦
New Yorkf	statewide				✦
Oklahomag	partial		✦
Puerto Rico	statewide	✦	✦
Vermonth	partial		✦	✦
Wisconsin	statewide		✦

Note: Data from https://www.epa.gov/nutrient-policy-data/state-progress-toward-developing-numeric-nutrient-water-quality-criteria “Partial” describes states in which nutrient criteria cover only a subset of river or streams in the state or territory. Both partial and statewide criteria often cover water bodies supporting a variety of “designated uses” including drinking water, aquatic life, fishing, swimming, and other recreation, unless specifically noted.

^aIncludes criteria that use “phosphates” and “orthophosphate”.

^bTotal inorganic nitrogen.

^cTotal Kjeldahl nitrogen.

^dApplies to freshwater springs.

^eApplies to open coastal waters which includes rivers and streams under some tidal influence.

^fApplies to fish propagation and trout waters.

^gApplies to scenic rivers statewide.

^hApplies to “ecological” waters with designated uses for aquatic life, aesthetics, swimming/contact recreation, boating, fishing and other recreation.