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

Water quality monitoring station

39A090 - Yakima R nr Cle Elum

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
Oxygen
9/16/2009	08:32	mg/L	9.5	9		5
9/9/2008	08:18	mg/L	9.5	8.8		7
8/12/2008	10:39	mg/L	9.5	9.4		1
8/14/2007	07:40	mg/L	9.5	8.9		7
9/13/2006	09:35	mg/L	9.5	9.4		1
8/16/2006	09:45	mg/L	9.5	9.5		0
9/14/2005	10:05	mg/L	9.5	9.5		0
8/3/2005	08:55	mg/L	9.5	8.7		8
7/13/2005	09:49	mg/L	9.5	9.5		0
10/6/2004	09:09	mg/L	9.5	9.2		3
9/15/2004	08:57	mg/L	9.5	9.2		3
8/4/2004	09:40	mg/L	9.5	8.8		8
7/14/2004	06:45	mg/L	9.5	8.9		7
9/10/2003	06:50	mg/L	9.5	8.9		6
8/6/2003	08:10	mg/L	9.5	8.9		6
7/9/2003	07:59	mg/L	9.5	9.4		1
9/3/2001	09:45	mg/L	9.5	8		16
8/13/2001	10:15	mg/L	9.5	8.2		13
7/9/2001	09:50	mg/L	9.5	9.2		3
9/4/2000	11:50	mg/L	9.5	9.5		0
8/14/2000	11:00	mg/L	9.5	9.4		1
9/7/1998	12:00	mg/L	9.5	9.1		4
8/10/1998	10:10	mg/L	9.5	8.8		7
9/15/1997	08:10	mg/L	9.5	9.2		3
Temperature
date	time	units	criterion	result	remark	% exceed
9/16/2009	08:32	deg C	13	14.1		8
8/3/2005	08:55	deg C	16	17		6
8/4/2004	09:40	deg C	16	17.5		9
9/9/2002	13:20	deg C	16	16.7		4
8/5/2002	13:35	deg C	16	16.3		2
8/13/2001	10:15	deg C	16	21.2		32
9/7/1998	12:00	deg C	16	16.2		1

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
9/6/1999	13:20	mg/L	0.044		0.011	0.002	12
8/1/1999	14:45	mg/L	0.042		0.011	0.002	12
7/5/1999	13:10	mg/L	0.025		0.011	0.002	12
5/10/1999	10:55	mg/L	0.028		0.013	0.005	11
10/12/1998	09:30	mg/L	0.172		0.014	0.01	12
Barometric Pressure
date	time	units	result	remark	QMEAN	QSD	QDP
9/15/2004	08:57	mm/Hg	735.076		712.8842	5.656209	18
5/5/2004	08:52	mm/Hg	750.824		712.0632	11.77027	18
12/4/2002	10:50	mm/Hg	690.88	J	711.5964	6.230908	18
11/6/2002	07:30	mm/Hg	685.8	J	711.5964	6.230908	18
10/9/2002	08:35	mm/Hg	688.34	J	711.5964	6.230908	18
Conductivity
date	time	units	result	remark	QMEAN	QSD	QDP
6/2/2009	09:45	umhos/cm	99		61.66667	5.687964	18
4/13/2009	09:25	umhos/cm	84		61.66667	5.687964	18
4/14/2008	08:52	umhos/cm	76		61.66667	5.687964	18
3/17/2008	08:40	umhos/cm	96		71	7.829056	18
12/11/2006	08:20	umhos/cm	71		52.77778	6.616601	17
11/15/2006	08:35	umhos/cm	70		52.77778	6.616601	17
12/7/2005	09:03	umhos/cm	69		52.77778	6.616601	17
11/8/2005	08:39	umhos/cm	71		52.77778	6.616601	17
11/3/2004	08:55	umhos/cm	64		51.61111	6.148888	17
12/9/2003	08:55	umhos/cm	65		51.61111	6.148888	17
7/9/2003	07:59	umhos/cm	79		47.33333	6.097251	18
12/4/2000	09:00	umhos/cm	40		61.333	7.785	12
6/5/2000	10:30	umhos/cm	171		53.417	7.879	12
4/3/2000	10:15	umhos/cm	97		53.417	7.879	12
3/7/2000	09:40	umhos/cm	142		60.167	8.569	12
11/1/1999	13:25	umhos/cm	12		61.333	7.785	12
4/12/1999	10:10	umhos/cm	71		53.417	7.879	12
2/1/1999	13:20	umhos/cm	35		60.167	8.569	12
1/11/1999	10:50	umhos/cm	167		60.167	8.569	12
Fecal Coliform Bacteria
date	time	units	result	remark	QMEAN	QSD	QDP
1/12/2009	07:55	#/100ml	8		2.555556	1.885618	18
3/17/2008	08:40	#/100ml	9		2.555556	1.885618	18
2/20/2008	08:30	#/100ml	12		2.555556	1.885618	18
1/8/2008	09:55	#/100ml	10		2.555556	1.885618	18
3/7/2007	09:05	#/100ml	5		1.5625	1.314978	16
2/7/2007	08:33	#/100ml	5	J	1.5625	1.314978	16
1/10/2007	08:25	#/100ml	6	J	1.5625	1.314978	16
12/11/2006	08:20	#/100ml	26		5.111111	5.132238	18
8/3/2005	08:55	#/100ml	38		13.11111	9.993462	18
12/8/2004	09:20	#/100ml	24	J	5.111111	5.132238	18
10/6/2004	09:09	#/100ml	39		5.833333	5.458399	18
10/8/2001	10:05	#/100ml	16	J	6.333	3.525	12
11/6/2000	09:50	#/100ml	15	J	6.333	3.525	12
6/5/2000	10:30	#/100ml	42		6.75	9.808	12
11/3/1997	08:55	#/100ml	14		6.333	3.525	12
5/12/1997	08:10	#/100ml	36		6.75	9.808	12
Flow
date	time	units	result	remark	QMEAN	QSD	QDP
6/9/1997	10:55	CFS	5647		1519.444	1123.255	9
5/12/1997	08:10	CFS	6605		1519.444	1123.255	9
4/14/1997	10:10	CFS	4750		1519.444	1123.255	9
Nitrate+Nitrite-Nitrogen
date	time	units	result	remark	QMEAN	QSD	QDP
7/8/2008	09:35	mg/L	0.013		1.035294E-02	9.963168E-04	17
4/14/2008	08:52	mg/L	0.021		0.0115	2.854305E-03	18
Nitrate-Nitrite
date	time	units	result	remark	QMEAN	QSD	QDP
12/6/1999	11:40	mg/L	0.061		0.024	0.016	11
12/14/1998	10:10	mg/L	0.081		0.024	0.016	11
12/8/1997	08:40	mg/L	0.063		0.024	0.016	11
3/10/1997	10:20	mg/L	0.108		0.045	0.023	12
Oxygen
date	time	units	result	remark	QMEAN	QSD	QDP
7/6/2009	10:54	mg/L	10.4		9.35	0.489949	17
3/9/2005	08:37	mg/L	11.4		12.50722	0.485081	18
4/1/2002	14:45	mg/L	13.4		11.32833	0.684606	18
3/4/2002	14:00	mg/L	13.4		12.45056	0.3759298	18
2/4/2002	14:35	mg/L	13.4		12.45	0.373	12
12/3/2001	14:10	mg/L	13.3		11.058	0.979	12
9/3/2001	09:45	mg/L	8		9.308	0.44	12
8/13/2001	10:15	mg/L	8.2		9.308	0.44	12
9/6/1999	13:20	mg/L	10.2		9.308	0.44	12
8/1/1999	14:45	mg/L	10.7		9.308	0.44	12
7/5/1999	13:10	mg/L	10.5		9.308	0.44	12
5/10/1999	10:55	mg/L	12.8		11.192	0.663	12
pH
date	time	units	result	remark	QMEAN	QSD	QDP
1/12/2009	07:55	pH	7		7.563889	0.2615371	18
12/1/2008	08:55	pH	7.1		7.52	0.1614275	18
11/19/2008	14:30	pH	7.2		7.52	0.1614275	18
7/19/2006	11:40	pH	8.2		7.351111	0.388873	18
9/9/2002	13:20	pH	7.9		7.130556	0.3712534	18
7/8/2002	14:02	pH	8.2		7.130556	0.3712534	18
7/9/2001	09:50	pH	7.8		7.133	0.32	12
11/6/2000	09:50	pH	8.2		7.308	0.385	12
10/13/1997	09:00	pH	8.1		7.308	0.385	12
Phosphorus, Sol Reactive
date	time	units	result	remark	QMEAN	QSD	QDP
7/6/2009	10:54	mg/L	0.0056		3.294118E-03	5.285246E-04	17
6/3/2008	08:07	mg/L	0.0052		3.661111E-03	5.912488E-04	18
8/5/2002	13:35	mg/L	0.0031		5.235294E-03	7.52447E-04	17
7/8/2002	14:02	mg/L	0.003	U	5.235294E-03	7.52447E-04	17
4/12/1999	10:10	mg/L	0.011		0.006	0.002	12
3/15/1999	11:30	mg/L	0.011		0.006	0.002	12
Phosphorus, Total
date	time	units	result	remark	QMEAN	QSD	QDP
12/4/2002	10:50	mg/L	0.012		6.094445E-02	1.893487E-02	17
11/6/2002	07:30	mg/L	0.016		6.094445E-02	1.893487E-02	17
10/9/2002	08:35	mg/L	0.01		6.094445E-02	1.893487E-02	17
9/7/1998	12:00	mg/L	0.038		0.013	0.006	12
11/3/1997	08:55	mg/L	0.082		0.019	0.023	11
9/15/1997	08:10	mg/L	0.028		0.013	0.006	12
5/12/1997	08:10	mg/L	0.124		0.028	0.036	11
2/10/1997	10:45	mg/L	0.051		0.017	0.012	12
12/9/1996	11:15	mg/L	0.777		0.019	0.023	11
Suspended Solids
date	time	units	result	remark	QMEAN	QSD	QDP
6/2/2009	09:45	mg/L	9		3.722222	1.840894	18
5/11/2009	10:47	mg/L	9		3.722222	1.840894	18
4/13/2009	09:25	mg/L	12		3.722222	1.840894	18
1/12/2009	07:55	mg/L	22		2.277778	1.564517	18
11/15/2006	08:35	mg/L	6		1.666667	1.188177	18
8/13/2001	10:15	mg/L	5	J	2.75	1.055	12
7/9/2001	09:50	mg/L	5		2.75	1.055	12
9/4/2000	11:50	mg/L	7		2.75	1.055	12
4/3/2000	10:15	mg/L	62		8.833	15.438	12
5/12/1997	08:10	mg/L	57		8.833	15.438	12
Temperature
date	time	units	result	remark	QMEAN	QSD	QDP
7/8/2008	09:35	deg C	10.4		14.7	1.601171	17
1/9/2006	08:45	deg C	0		2.427778	1.175137	18
3/9/2005	08:37	deg C	6.3		2.427778	1.175137	18
1/5/2005	08:45	deg C	0		2.427778	1.175137	18
10/6/2004	09:09	deg C	13.1		6.038889	3.296012	18
6/10/2002	14:45	deg C	12.2		6.4	2.570649	18
3/4/2002	14:00	deg C	4.6		1.522222	1.124359	18
8/13/2001	10:15	deg C	21.2		13.7	2.27	12
1/12/1998	08:00	deg C	-1.1		2.267	1.312	12
Total Persulf Nitrogen
date	time	units	result	remark	QMEAN	QSD	QDP
4/14/2008	08:52	mg/L	0.073		0.0405	1.104137E-02	18
1/9/2006	08:45	mg/L	0.27		8.027778E-02	2.257488E-02	17
8/14/2000	11:00	mg/L	0.131		0.045	0.021	9
8/1/1999	14:45	mg/L	0.108		0.045	0.021	9
1/12/1998	08:00	mg/L	0.047		0.099	0.025	9
5/12/1997	08:10	mg/L	0.154		0.067	0.041	8
3/10/1997	10:20	mg/L	0.158		0.099	0.025	9
Turbidity
date	time	units	result	remark	QMEAN	QSD	QDP
6/2/2009	09:45	NTU	5.2		2.111111	1.429475	18
1/12/2009	07:55	NTU	21		1.311111	1.090002	18
7/8/2008	09:35	NTU	2.4		1.382353	0.5040279	17
11/15/2006	08:35	NTU	6.6		1.2	0.6764961	18
11/3/2004	08:55	NTU	3.1		1.127778	0.5388501	18
11/5/2003	09:24	NTU	2.8		1.127778	0.5388501	18
9/9/2002	13:20	NTU	0.6		1.5	0.4144451	18
8/14/2000	11:00	NTU	2.4		1.467	0.375	12
3/7/2000	09:40	NTU	10		1.975	1.867	12
1/3/2000	13:00	NTU	6.7		1.975	1.867	12
1/11/1999	10:50	NTU	7.1		1.975	1.867	12
5/12/1997	08:10	NTU	30		4.942	8.279	12

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.