USGS WRIR 98-4222: Table 11

Pesticides in Streams of the United States--Initial Results from the National Water-Quality Assessment Program

By Steven J. Larson, Robert J. Gilliom, and Paul D. Capel

U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 98-4222
Sacramento, California, 1999

Table 11. Estimated number of days per year that selected compounds exceeded an aquatic-life criterion value, by type of site For some sites, estimates are shown for more than 1 year. Estimates are for compounds th;at exceeded an aquatic-life criterion at 10 or more sites. Crop group codes are defined in table 4. Values shown as a range indicate that there was uncertainty about whether the concentration remained above the criteria value between successive samples. nsd, not sufficient data–sampling was not frequent enough to provide a reliable estimate. Value shown has greater uncertainty than other values in table. –, no crop group classifiction assigned]

Site code	Crop group code	Year	Estimated number of days per year concentration exceeded an aquatic-life criterion
			Atrazine	Cyanazine	Azinphos- methyl	Chlorpyrifos	Diazinon	Malathion
AGRICULTURAL INDICATOR SITES
lsus-mill	C	1993	0	0	0	0	0	0
lsus-mill	C	1994	0	0	0	0	0	0
cnbr-prairie	C	1993	42 to 91	0	0	1	0	0
wmic-duck	C	1993	14	3	0	0	0	0
wmic-duck	C	1994	10	0	0	0	0	0
hdsn-canaj	CA	1994	8	0	0	0	0	0
poto-muddy	CA	1993	7	0	0	0	0	0
wmic-nbmilw	CAv	1993	0	0	0	0	0	0
wmic-nbmilw	CAv	1994	0	0	0	0	0	0
cnbr-maple	CS	1992	42	30	0	1	0	0
cnbr-maple	CS	1993	70	3 to 56	0	1	0	0
cnbr-shell	CS	1993	35 to 77	15 to 56	0	2	0	0
whit-kess	CS	1993	72	32	0	3	0	0
whit-kess	CS	1994	70	1 to 28	0	2	0	1
whit-sugar	CS	1992	42	1	0	0	1	0
whit-sugar	CS	1993	28	0	0	0	1	0
albe-pete	CScot	1993	0	0	0	0	1	0
albe-albe	CSW	1993	0	0	1	0	0	0
lsus-eastm	CW	1993	0	0	0	0	0	0
lsus-eastm	CW	1994	15	0	0	0	0	0
poto-mono	CW	1994	20	1	1	0	1	1
splt-lone	CW	1993	7	2	1	1	1	0
splt-lone	CW	1994	0	0	0	0	1	0
acfb-lime	CWp	1993	0	0	0	0	0	0
trin-chamb	CWsor	1994	84	0	1	0	0	0
ccpt-crab.rl	WA	1993	0	0	70	8	0	0
usnk-rock	WAb	1993	0	0	0	0	0	0
usnk-rock	WAb	1994	0	0	0	0	0	0
ccpt-palouse	Wb	1993	0	0	0	0	0	0
redn-turtle	Wb	1993	0	0	0	0	0	0
usnk-teton	Wpot	1993	0	0	0	0	0	0
gafl-tucsa	WScot	1993	0	0	0	0	0	0
albe-devils	WStob	1993	0	0	0	0	0	0
ccpt-crab.m	W	1993	0	0	1	0	0	0
ccpt-el68	W	1993	0	0	16	2	0	0
redn-snake	W	1993	0	0	0	0	0	0
redn-wildr	W	1993	0	0	0	0	0	0
gafl-little	P	1993	0	0	0	0	0	0

Table 11. Estimated number of days per year that selected compounds exceeded an aquatic-life criteria value, by type of site--Continued

Site code	Crop group code	Year	Estimated number of days per year concentration exceeded an aquatic-life criterion
			Atrazine	Cyanazine	Azinphos- methyl	Chlorpyrifos	Diazinon	Malathion
AGRICULTURAL INDICATOR SITESCONTINUED
acfb-aycocks	P	1993	0	0	0	0	0	0
acfb-aycocks	P	1994	0	0	0	1	0	0
sanj-salt	COTv	1993	0	0	0	1	49	1
will-pudding	FGv	1993	0	0	1	0	0	0
will-zollner	FGv	1993	49	0	1	0	35	1
will-zollner	FGv	1994	14	0	0	1	21	0
sanj-merced	O	1993	0	0	1	10	14	0
sanj-merced	O	1994	0 (nsd)	0 (nsd)	0	10	14	0
sanj-orest	O	1992	0	0	77 (nsd)	49	40	0
sanj-orest	O	1993	0	0	130 (nsd)	17 to 25	23	0
ozrk-dous	XX	1994	0	0	0	0	0	0
ozrk-yocum	XX	1994	0	0	0	0	0	0

URBAN INDICATOR SITES
conn-norwalk	--	1993	0	0	0	0	0	0
conn-norwalk	--	1994	0	0	0	0	0	1
hdsn-lisha	--	1994	0	0	0	0	0	0
lsus-cedar	--	1993	0	0	0	0	0	0
lsus-cedar	--	1994	0	0	0	0	0	0
poto-acco	--	1994	0	0	0	0	77	2
gafl-lafayette	--	1993	0	0	0	0	14 to 28	0
gafl-lafayette	--	1994	0 (nsd)	0 (nsd)	0 (nsd)	0 (nsd)	8 (nsd)	1 (nsd)
acfb-sope	--	1993	0	0	0	2	17	0
whit-little	--	1992	14	1	1	1	38	2
whit-little	--	1993	17	0	0	2	24	1
whit-little	--	1994	0	0	0	0	1	0
splt-cherry	--	1993	0	0	0	2	30	2
splt-cherry	--	1994	0	0	0	4	9	0
trin-rush	--	1993	0	0	1	13 to 38	180 to 250	3
nvbr-lasvegas	--	1993	0	0	0	0	11	4
nvbr-lasvegas	--	1994	0	0	0	4 to 20	30	0
will-fanno	--	1993	0	0	1	1	1	0
will-fanno	--	1994	0	0	0	0	1	0

INTEGRATOR SITES
hdsn-moh	CA	1994	0	0	0	0	0	0
poto-shenan	CA	1993	0	0	0	0	0	0
albe-tar	CScot	1993	0	0	0	0	0	0
gafl-withla	P	1993	0	0	0	0	0	0
whit-white	CS	1992	38	1	0	0	0	0
whit-white	CS	1993	63	14	0	1	0	0
whit-white	CS	1994	77	0	0	0	0	0
wmic-milw	CAv	1993	0	0	0	0	0	0
wmic-milw	CAv	1994	0	0	0	0	0	0
redn-rr.fargo	CSW	1994	0 (nsd)	0 (nsd)	0 (nsd)	0 (nsd)	0 (nsd)	0 (nsd)
redn-rr.em	W	1993	0	0	0	0	0	0
cnbr-platte	CW	1992	49	28	0	2	0	0
cnbr-platte	CW	1993	49	1 (nsd)	0	1 to 10	0	0
sanj-sanj	O	1993	0	0	35	0	35	0
sanj-sanj	O	1994	0 (nsd)	0 (nsd)	0 (nsd)	0 (nsd)	24 (nsd)	0 (nsd)

Pesticide National Synthesis Project

Pesticides in Streams of the United States--Initial Results from the National Water-Quality Assessment Program