CHEMICAL QUALITY OF PRECIPITATION

RED RIVER OF THE NORTH BASIN

484714097442301 ICELANDIC STATE PARK, ND

(National Trends Network precipitation-quality station)

LOCATION.--Lat 48×47'14", long 97×44'23", in SW1/4NW1/4SW1/4 sec. 10, T.161 N., R.55 W., Pembina County, Hydrologic Unit 09020313, at Icelandic State Park 5.6 mi west of Cavalier.

PERIOD OF RECORD.--October 1983 to current year (weekly composite).

INSTRUMENTATION.--The composite sample collector is an Aerochem Metrics1 model 301 wet/dry precipitation collector mounted on ground surface. Precipitation quantity is determined by a Belfort1 model 5-780 recording rain gage equipped with an event recorder and an Alter-type wind screen. The recording rain gage is installed 20 ft east of the sample collector with gage mouth and collector bucket elevations of 50.75 in above land surface.

REMARKS.--Data presented are provisional analyses by the Central Analytical Laboratory of the Illinois State Water Survey and have not completed quality-assurance review by the National Atmospheric Deposition Program. Analyses are determined from water taken from the sample collector.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Period of collection	Precip- itation total, in/wk (00046)	Collector efficiency, atm dep wet, percent (82284)	Specific conductance wat unf mS/cm 25 decC (00095)	Specific conductance wat unf lab mS/cm 25 decC (90095)	pH, water, unfiltrd field, std units (00400)	pH, water, unfiltrd lab, std units (00403)	Calcium, water, fltrd, mg/L (00915)	Magnes- ium, water, fltrd, mg/L (00925)
09/30 to 10/07	.00	--	--	--	--	--	--	--
10/07 to 10/14	.10	110	10	9	5.5	5.9	.364	.053
10/14 to 10/21	--	--	--	--	--	--	--	--
10/21 to 10/28	--	--	4	4	6.2	6.2	.188	.055
10/28 to 11/04	.10	60	--	2	--	5.8	.064	.009
11/04 to 11/11	.10	40	--	2	--	5.8	.045	.008
11/11 to 11/18	.15	47	--	3	--	5.8	.080	.018
11/18 to 11/25	.25	28	--	3	--	5.9	.142	.026
11/25 to 12/02	.02	100	--	6	--	5.1	--	--
12/02 to 12/09	.13	77	--	6	--	5.1	.062	.008
12/09 to 12/16	.10	80	--	5	--	5.2	.031	.004
12/16 to 12/23	b.00	--	--	--	--	--	--	--
12/23 to 12/30	.45	36	15	17	6.2	6.4	.340	.024
12/30 to 01/06	.65	17	--	4	--	5.3	.053	.009
01/06 to 01/13	.06	17	--	a9	--	a4.9	a.117	a.013
01/13 to 01/20	.05	20	--	a7	--	a5.6	a.321	a.053
01/20 to 01/27	.55	25	3	4	5.3	5.3	.038	.006
01/27 to 02/03	.13	85	--	4	--	5.1	.021	<.003
02/03 to 02/10	b--	--	--	--	--	--	--	--
02/10 to 02/17	b--	--	--	--	--	--	--	--
02/17 to 02/24	.10	80	--	11	--	4.7	.072	.009
02/24 to 03/02	.55	11	--	15	--	4.7	.138	.023
03/02 to 03/09	.17	24	--	17	--	4.5	.113	.016
03/09 to 03/16	b.05	<.20	--	8	--	6.3	--	--
03/16 to 03/23	.17	29	6	6	5.5	5.7	.093	.020
03/23 to 03/30	2.77	96	4	5	5.5	5.9	.051	.007
03/30 to 04/06	b.00	--	--	--	--	--	--	--
04/06 to 04/13	1.15	101	6	6	5.4	5.9	.211	.046
04/13 to 04/20	.45	107	8	8	5.7	6.4	.214	.032
04/20 to 04/27	.07	129	--	15	--	6.7	.385	.076
04/27 to 05/04	--	--	--	17	--	7.1	--	--
05/04 to 05/11	.60	120	18	19	6.3	6.6	.832	.129
05/11 to 05/18	2.37	86	10	8	6.1	6.2	.201	.022
05/18 to 05/25	.80	112	7	7	5.7	6.2	.161	.030
05/25 to 06/01	1.40	106	6	6	5.5	5.8	.086	.011
06/01 to 06/08	.48	102	20	21	6.7	6.8	.428	.072
06/08 to 06/15	.10	60	--	15	--	6.5	.305	.072
06/15 to 06/22	.20	120	6	6	5.7	5.3	.185	.042
06/22 to 06/29	.18	111	--	9	--	6.8	.700	.193
06/29 to 07/06	1.04	100	9	8	5.9	6.2	.098	.024
07/06 to 07/13	.80	99	4	4	5.5	5.6	.079	.012
07/13 to 07/20	.10	130	--	14	--	6.6	.699	.138
07/20 to 07/27	.35	106	4	4	5.3	5.5	.069	.018
07/27 to 08/03	.83	104	--	6	--	5.8	.191	.043
08/03 to 08/10	.80	95	9	9	6.0	6.5	.327	.050
08/10 to 08/17	.03	133	--	8	--	6.1	.299	.080
08/17 to 08/24	.73	129	7	7	6.0	6.4	.262	.056
08/24 to 08/31	1.60	104	3	5	5.6	5.7	.060	.011
08/31 to 09/07	.54	100	11	11	6.6	6.6	.396	.053
09/07 to 09/14	.22	95	--	12	--	6.5	.314	.039
09/14 to 09/20	.80	100	5	5	5.6	6.0	.094	.013
09/20 to 09/28	.60	98	5	7	6.1	6.4	.198	.036

CHEMICAL QUALITY OF PRECIPITATION

RED RIVER OF THE NORTH BASIN

484714097442301 ICELANDIC STATE PARK, ND--Continued

WATER-QUALITY DATA, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004

Period of collection	Sodium, water, fltrd, mg/L (00930)	Potasium, water, fltrd, mg/L (00935)	Sulfate, water, fltrd, mg/L (00945)	Chloride, water, fltrd, mg/L (00940)	Nitrate, water, fltrd, mg/L as N (00618)	Ammonia, water, fltrd, mg/L as N (00608)	Phos- phorus, water, fltrd, mg/L (00666)
09/30 to 10/07	--	--	--	--	--	--	--
10/07/to 10/14	.123	.029	1.1	.08	.341	.390	<.003
10/14 to 10/21	--	--	--	--	--	--	--
10/21 to 10/28	.006	.025	.35	.02	.059	<.020	<.003
10/28 to 11/04	.018	.008	.05	.04	.054	.090	<.003
11/04 to 11/11	.011	.003	.07	.02	.028	.050	<.003
11/11 to 11/18	.008	.009	.09	.02	.097	.070	<.003
11/18 to 11/25	.011	.019	.07	.03	.093	.070	<.003
11/25 to 12/02	--	--	--	--	--	--	--
12/02 to 12/09	.013	.012	.20	.02	.152	.120	<.003
12/09 to 12/16	.006	<.003	.14	<.01	.137	.190	<.003
12/16 to 12/23	--	--	--	--	--	--	--
12/23 to 12/30	.062	.065	1.7	.07	.603	1.16	<.003
12/30 to 01/06	.008	.013	.10	.02	.145	.070	<.003
01/06 to 01/13	a.038	a.096	a.17	a.15	a.310	a.120	a<.003
01/13 to 01/20	a.064	a.011	a.44	a.15	a.326	a.210	a<.003
01/20 to 01/27	.004	.025	.07	.03	.091	.050	<.003
01/27 to 02/03	.005	.004	.15	.02	.061	.020	<.003
02/03 to 02/10	--	--	--	--	--	--	--
02/10 to 02/17	--	--	--	--	--	--	--
02/17 to 02/24	.030	.018	.54	.04	.232	.140	<.003
02/24 to 03/02	.039	.015	1.5	.05	.353	.390	<.003
03/02 to 03/09	.028	<.003	.31	.07	.594	.130	<.003
03/09 to 03/16	--	--	--	--	--	--	--
03/16 to 03/23	.012	.006	.68	.02	.163	.360	<.003
03/23 to 03/30	.036	.008	.43	.05	.111	.300	<.003
03/30 to 04/06	--	--	--	--	--	--	--
04/06 to 04/13	.020	.028	.68	.03	.151	.300	<.003
04/13 to 04/20	.036	.020	.76	.05	.194	.500	<.003
04/20 to 04/27	.049	.038	1.3	.05	.494	1.19	<.003
04/27 to 05/04	--	--	--	--	--	--	--
05/04 to 05/11	.095	.048	1.5	.09	.669	1.28	<.003
05/11 to 05/18	.039	.018	.95	.05	.244	.610	<.003
05/18 to 05/25	.018	.012	.58	.03	.290	.520	<.003
05/25 to 06/01	.007	.010	.53	.02	.141	.280	<.003
06/01 to 06/08	.031	.071	1.6	.08	.672	1.74	<.003
06/08 to 06/15	.046	.978	1.3	.11	.290	.640	.436
06/15 to 06/22	.011	.028	.77	.03	.112	.130	<.003
06/22 to 06/29	.012	.024	.59	.04	.111	.340	<.003
06/29 to 07/06	.004	.007	.73	.02	.260	.660	<.003
07/06 to 07/13	.011	.012	.27	.03	.138	.190	<.003
07/13 to 07/20	.016	.073	1.0	.07	.352	.930	<.003
07/20 to 07/27	.005	.020	.24	.03	.072	.090	<.003
07/27 to 08/03	.006	.015	.83	.02	.188	.330	<.003
08/03 to 08/10	.018	.021	.84	.06	.354	.570	<.003
08/10 to 08/17	.021	.041	.97	.06	.169	.430	<.003
08/17 to 08/24	.020	.034	.72	.04	.221	.430	<.003
08/24 to 08/31	.004	.004	.30	.03	.116	.160	<.003
08/31 to 09/07	.030	.054	1.1	.07	.395	.730	<.003
09/07 to 09/14	.035	.037	1.4	.07	.415	.850	<.003
09/14 to 09/20	.009	.024	.53	.02	.091	.290	<.003
09/20 to 09/28	.031	.055	.54	.05	.146	.370	.021
1 The use of brand names in this report is for identification purposes only and does not imply endorsemet by the U.S. Geological Survey.
a To provide for an adequate sample, low-volume samples were diluted to a final volume of 50 milliliters.
b Trace of water collected in field sampler.
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