USGS Scientific Investigations Report 2011-5082 - Occurrence and Distribution of Pesticides in Surface Waters of the Hood River Basin, Oregon, 1999

Table 11. Detections in samples from the Hood River basin, Oregon, fruit packers’ study exceeding U.S. Environmental Protection Agency and Oregon freshwater aquatic life standards.

[Abbreviations: USEPA, U.S. Environmental Protection Agency; CMC, criteria maximum concentration; CCC, criterion continuous concentration; –, no water-quality standard]

	USEPA Office of Pesticide Programs Aquatic Life Benchmarks				USEPA Water Quality Criteria		Oregon Water Quality Criteria		Percentage exceeding lowest standard (%)
	Fish		Invertebrates		USEPA Water Quality Criteria		Oregon Water Quality Criteria
	Acute	Chronic	Acute	Chronic	CMC (Acute)	CCC (Chronic)	Acute	Chronic
Azinphos-methyl	0.18	0.055	0.08	0.036	–	–	–	0.01	60
Effluent									34
Surface water									57
Phosmet		3.2	1.0	0.8	–	–	–	–	6
Effluent									9
Surface water									4
Malathion	0.295	0.014	0.005	0.000026	–	0.1	–	0.1	2
Effluent									0
Surface water									11
Simazine	3,200	960	500	2,000	–	–	–	–	0

Occurrence and Distribution of Pesticides in Surface Waters of the Hood River Basin, Oregon, 1999–2009