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

Water quality monitoring station

41A070 - Crab Cr nr Beverly

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)
10/4/2004	14:40	#/100ml	400	410		2
4/3/2001	09:35	#/100ml	400	680	J	70
pH
date	time	units	criterion	result	remark	% exceed
6/3/2009	13:30	pH	8.5	8.6		1
8/15/2007	14:31	pH	8.5	8.6		1
8/14/2006	14:40	pH	8.5	8.6		1
3/6/2006	12:50	pH	8.5	8.6		1
2/6/2006	13:45	pH	8.5	8.6		1
1/11/2006	15:04	pH	8.5	8.6		1
8/1/2005	14:18	pH	8.5	8.6		1
6/6/2005	14:05	pH	8.5	8.6		1
4/4/2005	13:41	pH	8.5	8.6		1
3/7/2005	14:49	pH	8.5	8.7		3
10/8/2003	10:31	pH	8.5	8.6		1
7/9/2003	10:00	pH	8.5	8.6		1
8/7/2002	13:40	pH	8.5	8.7		2
1/9/2002	11:27	pH	8.5	8.6		1
3/6/2001	09:51	pH	8.5	8.7		3
8/9/2000	15:55	pH	8.5	8.7		2
10/13/1999	13:30	pH	8.5	8.6		1
9/8/1998	16:50	pH	8.5	8.9		5
8/11/1998	14:05	pH	8.5	9.1		7
7/14/1998	15:25	pH	8.5	8.7		2
6/16/1998	16:20	pH	8.5	8.8		4
4/7/1998	15:15	pH	8.5	8.7		2
3/10/1998	13:40	pH	8.5	8.8		4
8/12/1997	15:30	pH	8.5	8.7		2
4/15/1997	14:35	pH	8.5	8.9		5
3/11/1997	14:10	pH	8.5	8.6		1
Temperature
date	time	units	criterion	result	remark	% exceed
9/14/2009	13:48	deg C	17.5	20.4		17
8/12/2009	13:45	deg C	17.5	23		31
7/8/2009	14:05	deg C	17.5	20.8		19
6/3/2009	13:30	deg C	17.5	22		26
8/12/2008	12:15	deg C	21	21.2		1
8/15/2007	14:31	deg C	21	25		19
7/9/2007	13:05	deg C	21	23.6		12
8/14/2006	14:40	deg C	21	22.3		6
7/17/2006	13:52	deg C	21	22.7		8
6/6/2006	14:16	deg C	21	21.8		4
8/1/2005	14:18	deg C	21	23.5		12
7/11/2005	14:35	deg C	21	23.5		12
8/4/2004	11:28	deg C	21	22.3		6
7/14/2004	08:25	deg C	21	22.2		6
8/6/2003	10:20	deg C	21	21.3		1
7/10/2002	12:25	deg C	21	23.1		10
8/14/2001	09:55	deg C	21	24.7		18
7/10/2001	09:20	deg C	21	23.1		10
8/9/2000	15:55	deg C	21	24.2		15
8/11/1999	09:30	deg C	21	21.7		3
9/8/1998	16:50	deg C	21	22.5		7
8/11/1998	14:05	deg C	21	23.3		11
7/14/1998	15:25	deg C	21	23.7		13
8/12/1997	15:30	deg C	21	24.9		19
7/15/1997	14:30	deg C	21	23.4		11
6/10/1997	14:40	deg C	21	23.3		11
5/13/1997	14:30	deg C	21	21.6		3

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
11/1/2004	14:55	mg/L	0.048		1.622222E-02	9.570516E-03	18
5/10/2000	12:55	mg/L	0.105		0.019	0.012	11
6/9/1999	09:55	mg/L	0.117		0.019	0.012	11
5/5/1999	09:45	mg/L	0.056		0.019	0.012	11
1/13/1998	14:20	mg/L	0.1		0.027	0.021	11
Barometric Pressure
date	time	units	result	remark	QMEAN	QSD	QDP
9/14/2009	13:48	mm/Hg	744.728		751.0215	2.985802	18
9/9/2008	10:43	mm/Hg	744.982		751.1486	2.623502	18
4/14/2008	11:00	mm/Hg	743.712		750.5559	3.242822	18
3/10/2004	09:15	mm/Hg	767.08		750.8514	6.860669	18
2/11/2004	11:15	mm/Hg	766.826		750.8514	6.860669	18
3/5/2003	09:59	mm/Hg	736.092		750.5685	5.970436	17
11/6/2002	09:25	mm/Hg	723.9	J	750.5646	8.73212	18
10/9/2002	10:32	mm/Hg	724.154	J	750.5646	8.73212	18
Conductivity
date	time	units	result	remark	QMEAN	QSD	QDP
11/18/2008	14:50	umhos/cm	135		699.5555	121.2063	18
4/10/2006	14:20	umhos/cm	668		543.0555	57.12368	18
7/9/2003	10:00	umhos/cm	799		500.7222	46.35135	18
12/5/2001	12:12	umhos/cm	868		651	104.433	11
8/14/2001	09:55	umhos/cm	608		512	41.606	12
4/7/1999	11:00	umhos/cm	677		553.167	49.444	12
3/10/1999	09:25	umhos/cm	503	J	847.455	85.278	11
2/10/1999	10:15	umhos/cm	552		847.455	85.278	11
10/7/1998	09:45	umhos/cm	438		651	104.433	11
6/16/1998	16:20	umhos/cm	445		553.167	49.444	12
2/10/1998	14:05	umhos/cm	616		847.455	85.278	11
Fecal Coliform Bacteria
date	time	units	result	remark	QMEAN	QSD	QDP
1/13/2009	09:45	#/100ml	22		7.944445	4.696334	18
7/8/2008	11:20	#/100ml	310	J	85.61111	51.9413	18
6/3/2008	10:40	#/100ml	320		62.66667	42.80599	18
8/15/2007	14:31	#/100ml	17		128.6667	49.86098	18
10/3/2005	15:32	#/100ml	390	J	54.61111	71.58224	18
10/4/2004	14:40	#/100ml	410		44.5	65.69381	18
8/6/2003	10:20	#/100ml	230		110.2778	52.33018	18
10/10/2001	12:35	#/100ml	290		38.8	32.714	10
Flow
date	time	units	result	remark	QMEAN	QSD	QDP
7/14/1999	09:45	CFS	190		305.222	48.582	9
2/10/1998	14:05	CFS	277		186.556	31.588	9
1/13/1998	14:20	CFS	305		186.556	31.588	9
4/15/1997	14:35	CFS	319		252	25.065	9
3/11/1997	14:10	CFS	268		186.556	31.588	9
Nitrate+Nitrite-Nitrogen
date	time	units	result	remark	QMEAN	QSD	QDP
3/4/2009	13:55	mg/L	2.27		2.916111	0.2338712	18
2/20/2008	10:10	mg/L	2.31		2.916111	0.2338712	18
4/10/2006	14:20	mg/L	2.52		1.465056	0.4137877	18
Nitrate-Nitrite
date	time	units	result	remark	QMEAN	QSD	QDP
3/15/2000	13:25	mg/L	2.06		3.136	0.45	11
8/11/1999	09:30	mg/L	2.15		1.366	0.251	12
7/14/1999	09:45	mg/L	2.24		1.366	0.251	12
6/9/1999	09:55	mg/L	2.39		1.52	0.38	12
12/9/1998	09:40	mg/L	3.76		2.177	0.582	12
12/9/1997	14:25	mg/L	3.61		2.177	0.582	12
3/11/1997	14:10	mg/L	4.18		3.136	0.45	11
Oxygen
date	time	units	result	remark	QMEAN	QSD	QDP
5/8/2006	14:40	mg/L	13.1		9.933333	1.108019	18
3/7/2005	14:49	mg/L	15.5		12.46111	0.8267789	18
1/3/2005	15:15	mg/L	14.5		12.46111	0.8267789	18
12/6/2004	14:22	mg/L	14.5		11.27833	1.357598	18
4/15/1997	14:35	mg/L	12.5		9.692	1.223	12
pH
date	time	units	result	remark	QMEAN	QSD	QDP
10/9/2007	11:01	pH	8.2		8.401111	0.100463	18
3/7/2005	14:49	pH	8.7		8.402778	0.1381732	18
12/5/2000	10:00	pH	7.9		8.382	0.189	11
5/10/2000	12:55	pH	7.8		8.475	0.191	12
11/17/1999	12:50	pH	7.9		8.382	0.189	11
9/8/1998	16:50	pH	8.9		8.45	0.202	12
8/11/1998	14:05	pH	9.1		8.45	0.202	12
4/15/1997	14:35	pH	8.9		8.475	0.191	12
Phosphorus, Sol Reactive
date	time	units	result	remark	QMEAN	QSD	QDP
3/4/2009	13:55	mg/L	0.0307		6.152222E-02	1.449879E-02	18
1/13/2009	09:45	mg/L	0.105		6.152222E-02	1.449879E-02	18
3/17/2008	10:27	mg/L	0.019		6.152222E-02	1.449879E-02	18
2/20/2008	10:10	mg/L	0.116		6.152222E-02	1.449879E-02	18
12/13/2006	14:52	mg/L	0.0726		3.667222E-02	1.725926E-02	18
12/5/2005	15:03	mg/L	0.0724		3.667222E-02	1.725926E-02	18
10/3/2005	15:32	mg/L	0.078		3.667222E-02	1.725926E-02	18
5/8/2001	10:05	mg/L	0.04	J	0.015	0.007	12
9/13/2000	12:45	mg/L	0.046		0.011	0.004	12
5/5/1999	09:45	mg/L	0.047		0.015	0.007	12
4/7/1999	11:00	mg/L	0.041		0.015	0.007	12
Phosphorus, Total
date	time	units	result	remark	QMEAN	QSD	QDP
12/4/2002	13:18	mg/L	0.091		0.2278889	3.068591E-02	17
11/6/2002	09:25	mg/L	0.082		0.2278889	3.068591E-02	17
10/9/2002	10:32	mg/L	0.054		0.2278889	3.068591E-02	17
12/10/1996	15:15	mg/L	2.81		0.067	0.034	11
Suspended Solids
date	time	units	result	remark	QMEAN	QSD	QDP
3/4/2009	13:55	mg/L	28		16.61111	4.565071	18
6/6/2005	14:05	mg/L	21		68.38889	21.23853	18
1/3/2005	15:15	mg/L	8		18.11111	4.992805	18
1/13/1998	14:20	mg/L	42		20.091	7.867	11
Temperature
date	time	units	result	remark	QMEAN	QSD	QDP
6/6/2006	14:16	deg C	21.8		13.46667	3.843711	18
3/7/2005	14:49	deg C	12.5		4.222222	2.201218	18
4/3/2001	09:35	deg C	7.4		16.317	3.781	12
4/7/1999	11:00	deg C	6.8		16.317	3.781	12
Total Persulf Nitrogen
date	time	units	result	remark	QMEAN	QSD	QDP
9/14/2009	13:48	mg/L	2.96		1.632222	0.3040618	18
2/5/2007	14:04	mg/L	4.88		3.24	0.4010721	18
12/13/2006	14:52	mg/L	3.78		2.433889	0.588169	18
9/11/2006	14:10	mg/L	2.59		1.700556	0.3944836	18
2/6/2006	13:45	mg/L	4.55		3.24	0.4010721	18
12/5/2005	15:03	mg/L	3.75		2.433889	0.588169	18
4/4/2005	13:41	mg/L	3.86		1.959444	0.676222	18
11/6/2002	09:25	mg/L	0.32		2.449445	0.5787966	18
4/3/2001	09:35	mg/L	2.79		1.863	0.407	12
5/10/2000	12:55	mg/L	3.23		1.863	0.407	12
3/15/2000	13:25	mg/L	2.44		3.544	0.421	11
2/9/2000	14:40	mg/L	2.61		3.544	0.421	11
8/11/1999	09:30	mg/L	2.65		1.595	0.352	12
7/14/1999	09:45	mg/L	2.52		1.595	0.352	12
6/9/1999	09:55	mg/L	3		1.863	0.407	12
4/7/1999	11:00	mg/L	2.91		1.863	0.407	12
Turbidity
date	time	units	result	remark	QMEAN	QSD	QDP
8/12/2009	13:45	NTU	38		17.11111	9.09828	18
3/4/2009	13:55	NTU	19		9.405556	3.508389	18
11/18/2008	14:50	NTU	11		5.477778	2.256639	18
7/8/2008	11:20	NTU	39		17.11111	9.09828	18
3/6/2006	12:50	NTU	0.5	U	9.794444	2.799049	18
3/10/2004	09:15	NTU	16		9.644444	2.61921	18
11/5/2003	10:58	NTU	12		5.277778	1.989252	18
5/12/1998	16:10	NTU	55		32.5	10.005	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.