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environmental information > river & stream WQ monitoring > state network >

Water quality monitoring station

34A070 - Palouse R @ Hooper

Results that exceed water quality criteria or the usual range of data (since October, 1996)

Results that exceeded water quality standards criteria

The Department of Ecology places limits on how much pollution is allowed in our rivers to protect public health and enjoyment, and to support fish, shellfish, and wildlife (WAC 173-201A). Individual results for temperature, pH, oxygen, fecal coliform bacteria, and metals (where sampled) that are higher than these criteria are listed below. (The standards do not contain criteria for other types of water quality constituents.) This table includes only results from our monthly monitoring program. Results from other monitoring, such as continuous monitoring for temperature, are not evaluated here.

Exceeding a criterion does not necessarily mean the water quality standard has been violated. Often, other �pollution� conditions must exist for a stream segment to be in violation of water quality standards. In some cases, standards require that the source of pollution be human activities rather than natural causes. Also, more than a single result exceeding a criterion may be required.

Washington's Water Quality Standards were amended in November, 2006. Data in the tables below are based on the older standards through 2008. Data collected after 2008 are based on the ammended standards, excluding supplemental temperature criteria. We are currently working on incorporating supplemental temperature criteria into our evaluation procedures.

date	time	units	criterion	result	remark	% exceed
Fecal Coliform Bacteria (exceeding the ten percent criterion)
9/9/2003	08:10	#/100ml	400	1200	J	200
3/13/2002	10:00	#/100ml	400	460	J	15
11/2/1997	13:15	#/100ml	400	530		32
pH
date	time	units	criterion	result	remark	% exceed
9/16/2009	14:20	pH	8.5	8.7		2
8/5/2009	14:05	pH	8.5	9.3		10
7/8/2009	15:20	pH	8.5	8.8		3
6/3/2009	14:50	pH	8.5	8.6		1
11/5/2008	13:15	pH	8.5	8.6		1
10/8/2008	15:15	pH	8.5	8.6		2
9/10/2008	13:15	pH	8.5	8.7		3
11/6/2007	13:20	pH	8.5	9.1		7
10/10/2007	13:40	pH	8.5	8.6		2
9/12/2007	10:01	pH	8.5	8.8		3
8/13/2007	08:20	pH	8.5	8.9		5
5/7/2007	07:40	pH	8.5	9		6
9/12/2006	10:10	pH	8.5	8.7		2
8/15/2006	08:40	pH	8.5	8.9		5
5/9/2006	08:46	pH	8.5	9.4		10
12/6/2005	10:12	pH	8.5	8.6		1
9/13/2005	08:37	pH	8.5	8.8		3
8/2/2005	10:10	pH	8.5	8.8		3
3/8/2005	08:03	pH	8.5	8.8		4
11/2/2004	08:03	pH	8.5	8.7		2
10/5/2004	08:37	pH	8.5	8.7		2
8/4/2004	08:05	pH	8.5	9		6
6/16/2004	08:15	pH	8.5	8.9		5
4/14/2004	07:40	pH	8.5	9.2		8
11/4/2003	08:05	pH	8.5	8.8		3
8/5/2003	08:25	pH	8.5	9		6
5/6/2003	08:30	pH	8.5	9.2		8
10/15/2002	12:05	pH	8.5	8.8		3
9/11/2002	10:15	pH	8.5	8.7		2
8/14/2002	09:45	pH	8.5	8.9		4
5/15/2002	10:20	pH	8.5	9.6		13
10/16/2001	10:20	pH	8.5	8.7		2
9/11/2001	14:00	pH	8.5	8.7		2
8/7/2001	14:10	pH	8.5	8.9		4
7/10/2001	16:05	pH	8.5	9.4		11
6/12/2001	14:00	pH	8.5	9.7		14
5/15/2001	14:25	pH	8.5	8.7		2
11/14/2000	14:35	pH	8.5	8.8		3
10/10/2000	14:20	pH	8.5	8.8		4
8/8/2000	17:05	pH	8.5	9.2		9
7/11/2000	13:40	pH	8.5	8.8		4
5/9/2000	14:50	pH	8.5	8.6		1
10/12/1999	12:45	pH	8.5	8.8		4
9/12/1999	13:10	pH	8.5	9.1		7
7/11/1999	12:00	pH	8.5	9.4		11
5/2/1999	12:00	pH	8.5	8.8		4
11/1/1998	11:45	pH	8.5	8.6		1
10/4/1998	11:50	pH	8.5	8.8		4
9/13/1998	14:00	pH	8.5	8.6		1
8/2/1998	13:50	pH	8.5	9.2		8
7/5/1998	12:35	pH	8.5	8.8		4
5/3/1998	13:05	pH	8.5	8.8		4
12/7/1997	14:05	pH	8.5	8.6		1
10/5/1997	11:35	pH	8.5	8.7		2
9/7/1997	13:50	pH	8.5	8.9		5
8/3/1997	13:20	pH	8.5	9.1		7
7/6/1997	12:10	pH	8.5	8.8		4
10/6/1996	12:05	pH	8.5	9.1		7
Temperature
date	time	units	criterion	result	remark	% exceed
9/16/2009	14:20	deg C	17.5	20.9		19
8/5/2009	14:05	deg C	17.5	25.1		43
7/8/2009	15:20	deg C	17.5	22.9		31
6/3/2009	14:50	deg C	17.5	21.6		23
8/6/2008	13:45	deg C	21	25.1		20
7/10/2007	08:00	deg C	21	23.2		10
6/7/2006	08:04	deg C	21	22.6		8
8/2/2005	10:10	deg C	21	22.2		6
7/12/2005	08:28	deg C	21	21.4		2
8/4/2004	08:05	deg C	21	21.4		2
7/14/2004	08:10	deg C	21	21.5		2
8/5/2003	08:25	deg C	21	22.9		9
8/14/2002	09:45	deg C	21	21.6		3
7/17/2002	09:45	deg C	21	23.7		13
8/7/2001	14:10	deg C	21	25.9		23
7/10/2001	16:05	deg C	21	27.8		32
8/8/2000	17:05	deg C	21	22.5		7
7/11/2000	13:40	deg C	21	21.8		4
8/8/1999	12:15	deg C	21	21.1		0
7/11/1999	12:00	deg C	21	22.6		8
8/2/1998	13:50	deg C	21	23.7		13
7/5/1998	12:35	deg C	21	22.1		5
8/3/1997	13:20	deg C	21	26.4		26
7/6/1997	12:10	deg C	21	22.3		6

Results that contrast strongly with historical data

Results exceeding the usual range of data (defined as 2 standard deviations beyond the mean value for a station based on data from the same three-month period over the previous six years) are shown below. A certain percentage of results will always be listed in this report. Inclusion here does not necessarily indicate something unique is occurring in the watershed.

date	time	units	result	remark	QMEAN	QSD	QDP
Ammonia-Nitrogen
6/4/2008	13:30	mg/L	0.072		0.022	2.273634E-02	18
2/13/2008	13:40	mg/L	0.085		2.552941E-02	2.201737E-02	17
10/10/2007	13:40	mg/L	0.027		1.572222E-02	4.675412E-03	18
5/5/2004	07:18	mg/L	0.089		2.566667E-02	2.134865E-02	18
6/5/2002	10:15	mg/L	0.072		2.483333E-02	2.020847E-02	18
8/8/1999	12:15	mg/L	0.084		0.028	0.022	18
Barometric Pressure
date	time	units	result	remark	QMEAN	QSD	QDP
6/4/2008	13:30	mm/Hg	754.888		732.4655	9.929841	18
8/13/2007	08:20	mm/Hg	740.41		726.557	6.738087	18
5/7/2007	07:40	mm/Hg	744.22		726.7294	6.833841	18
3/6/2007	07:47	mm/Hg	742.442		727.9376	6.684291	17
10/10/2006	08:08	mm/Hg	742.696		728.5489	6.827936	18
9/12/2006	10:10	mm/Hg	740.156		726.557	6.738087	18
5/9/2006	08:46	mm/Hg	744.474		726.7294	6.833841	18
2/7/2006	07:55	mm/Hg	746.76		727.9376	6.684291	17
12/6/2005	10:12	mm/Hg	749.554		728.5489	6.827936	18
11/9/2005	09:25	mm/Hg	745.236		728.5489	6.827936	18
10/4/2005	08:13	mm/Hg	745.236		728.5489	6.827936	18
7/12/2005	08:28	mm/Hg	740.41		726.557	6.738087	18
4/5/2005	08:07	mm/Hg	747.014		726.7294	6.833841	18
3/8/2005	08:03	mm/Hg	743.966		727.9376	6.684291	17
2/8/2005	09:02	mm/Hg	744.728		727.9376	6.684291	17
12/7/2004	08:00	mm/Hg	751.332		728.5489	6.827936	18
6/16/2004	08:15	mm/Hg	745.236		725.0067	5.491636	18
12/17/2002	08:20	mm/Hg	711.2		731.7346	5.409295	18
8/14/2002	09:45	mm/Hg	716.788		729.8273	5.613173	18
6/5/2002	10:15	mm/Hg	716.534		729.6204	6.002865	18
4/10/2002	10:38	mm/Hg	716.28		729.6204	6.002865	18
2/13/2002	12:05	mm/Hg	718.312		736.314	6.859	14
Conductivity
date	time	units	result	remark	QMEAN	QSD	QDP
2/4/2009	13:45	umhos/cm	351		216.5263	47.37952	19
7/9/2008	13:25	umhos/cm	267		329.1111	14.4462	18
1/15/2008	13:30	umhos/cm	358		216.5263	47.37952	19
11/13/2006	09:05	umhos/cm	189		317.4445	56.64671	18
6/5/2002	10:15	umhos/cm	147		228.7778	33.44628	18
4/10/2002	10:38	umhos/cm	113		228.7778	33.44628	18
Fecal Coliform Bacteria
date	time	units	result	remark	QMEAN	QSD	QDP
5/6/2009	13:30	#/100ml	300		51.38889	44.89745	18
5/7/2008	13:30	#/100ml	200	J	51.38889	44.89745	18
6/11/2007	08:08	#/100ml	150		32.72222	29.23094	18
6/7/2006	08:04	#/100ml	160	J	32.72222	29.23094	18
9/9/2003	08:10	#/100ml	1200	J	59.70588	56.46101	17
3/13/2002	10:00	#/100ml	460	J	52.64706	76.8651	17
6/7/1998	14:55	#/100ml	310		54.722	47.855	18
Flow
date	time	units	result	remark	QMEAN	QSD	QDP
3/7/1999	11:30	CFS	2620		806.917	736.84	12
2/7/1999	12:35	CFS	2860		806.917	736.84	12
7/5/1998	12:35	CFS	152		52.933	48.333	15
7/6/1997	12:10	CFS	260		52.933	48.333	15
5/4/1997	12:20	CFS	2480		649.733	657.481	15
3/2/1997	12:45	CFS	2700		806.917	736.84	12
2/2/1997	12:10	CFS	8600		806.917	736.84	12
1/12/1997	15:35	CFS	3600		806.917	736.84	12
12/1/1996	11:30	CFS	770		171.933	272.776	15
Nitrate+Nitrite-Nitrogen
date	time	units	result	remark	QMEAN	QSD	QDP
7/8/2009	15:20	mg/L	0.841		0.2940556	0.2280832	18
4/8/2009	14:25	mg/L	3.48		1.2425	0.8471854	18
4/9/2008	14:35	mg/L	3.53		1.2425	0.8471854	18
3/8/2005	08:03	mg/L	0.915		4.854118	1.291337	17
2/8/2005	09:02	mg/L	1.99		4.854118	1.291337	17
1/4/2005	07:37	mg/L	1.84		4.854118	1.291337	17
2/11/2004	07:45	mg/L	6.87		4.561666	1.061321	18
4/8/2003	07:30	mg/L	4.01		1.842278	0.9275016	18
Nitrate-Nitrite
date	time	units	result	remark	QMEAN	QSD	QDP
7/6/1997	12:10	mg/L	1.99		0.415	0.546	18
12/1/1996	11:30	mg/L	4.98		1.586	1.349	18
Oxygen
date	time	units	result	remark	QMEAN	QSD	QDP
7/8/2009	15:20	mg/L	9.9		8.166667	0.6803632	18
9/10/2008	13:15	mg/L	9.8		8.166667	0.6803632	18
7/9/2008	13:25	mg/L	9.8		8.166667	0.6803632	18
6/7/2006	08:04	mg/L	7.7		10.18111	1.115642	18
10/5/2004	08:37	mg/L	8.9		11.93333	1.463252	18
10/8/2003	08:30	mg/L	8.7		11.99167	1.449062	18
7/8/2003	07:50	mg/L	7.3		10.30833	1.373751	18
8/14/2002	09:45	mg/L	8.3		10.82722	1.090244	18
7/17/2002	09:45	mg/L	7.9		10.82722	1.090244	18
2/13/2002	12:05	mg/L	10.4		12.527	0.756	15
12/12/2000	14:25	mg/L	15		12.044	1.242	18
11/14/2000	14:35	mg/L	15.5		12.044	1.242	18
12/14/1999	16:25	mg/L	9.4		12.044	1.242	18
pH
date	time	units	result	remark	QMEAN	QSD	QDP
8/5/2009	14:05	pH	9.3		8.585556	0.3165108	18
12/3/2008	14:25	pH	7.3		8.401111	0.2711173	18
11/6/2007	13:20	pH	9.1		8.401111	0.2711173	18
3/8/2005	08:03	pH	8.8		8.032105	0.1564388	19
7/17/2002	09:45	pH	8.2		9.030556	0.3902861	18
5/15/2002	10:20	pH	9.6		8.285	0.4954172	18
6/12/2001	14:00	pH	9.7		8.267	0.445	18
12/6/1998	13:30	pH	7		8.311	0.421	18
1/12/1997	15:35	pH	6.8		7.827	0.349	15
Phosphorus, Sol Reactive
date	time	units	result	remark	QMEAN	QSD	QDP
2/13/2008	13:40	mg/L	0.16		9.683529E-02	2.777676E-02	17
1/15/2008	13:30	mg/L	0.175		9.683529E-02	2.777676E-02	17
7/10/2007	08:00	mg/L	0.128		4.255556E-02	3.377938E-02	18
11/9/2005	09:25	mg/L	0.243	J	6.598889E-02	5.970698E-02	18
3/8/2005	08:03	mg/L	0.015		0.1235647	2.766098E-02	17
7/17/2002	09:45	mg/L	0.101		3.274444E-02	2.700325E-02	18
2/7/1999	12:35	mg/L	0.198		0.12	0.028	15
Phosphorus, Total
date	time	units	result	remark	QMEAN	QSD	QDP
2/7/1999	12:35	mg/L	0.442		0.225	0.104	15
4/6/1997	12:05	mg/L	0.408		0.17	0.094	17
Suspended Solids
date	time	units	result	remark	QMEAN	QSD	QDP
4/8/2009	14:25	mg/L	173		20.38889	13.67754	18
6/4/2008	13:30	mg/L	68		20.38889	13.67754	18
4/11/2006	09:46	mg/L	54		20.94444	11.88411	18
9/7/1997	13:50	mg/L	74		37	17.727	18
Temperature
date	time	units	result	remark	QMEAN	QSD	QDP
10/8/2008	15:15	deg C	14.7		6.222222	4.029969	18
6/7/2006	08:04	deg C	22.6		13.31111	4.091439	18
3/8/2005	08:03	deg C	9.4		3.794737	2.358312	19
3/24/2004	14:51	deg C	9.7		3.144444	1.820544	18
3/10/2004	07:45	deg C	6.8		3.144444	1.820544	18
9/9/2003	08:10	deg C	15.1	J	21.71111	3.248328	18
7/10/2001	16:05	deg C	27.8		20.806	3.225	18
3/13/2001	13:45	deg C	8.5		3.133	2.204	15
Total Persulf Nitrogen
date	time	units	result	remark	QMEAN	QSD	QDP
7/8/2009	15:20	mg/L	1.13		0.6037222	0.2140115	18
4/9/2008	14:35	mg/L	3.9		1.604889	0.9791201	18
3/8/2005	08:03	mg/L	1.22		5.373125	1.646826	16
4/8/2003	07:30	mg/L	4.45		2.183944	0.9668071	18
12/1/1996	11:30	mg/L	6	J	2.325	1.607	12
Turbidity
date	time	units	result	remark	QMEAN	QSD	QDP
4/8/2009	14:25	NTU	100		10.80556	8.876902	18
6/4/2008	13:30	NTU	75		10.80556	8.876902	18
2/6/2007	09:30	NTU	550		76.47369	144.732	19
4/11/2006	09:46	NTU	31		11.41667	7.245141	18
4/5/2005	08:07	NTU	27		11.41667	7.245141	18
11/2/1997	13:15	NTU	300		50.772	67.584	18
12/1/1996	11:30	NTU	240		50.772	67.584	18

Note: QMEAN, QSD, and QDP are the quarterly mean, standard deviation, and number of data points for the last six years, where available, for the station shown.

Washington State Department of Ecology

Data users please read disclaimer.

Questions or comments on content may be sent to Dave Hallock
Questions or comments on presentation may be sent to Steve Barrett.