CHEMICAL QUALITY OF PRECIPITATION

                                                  RED RIVER OF THE NORTH BASIN

                                            484714097442301  ICELANDIC STATE PARK, ND
                                     (National Trends Network precipitation-quality station)

LOCATION.--Lat 4847'14", long 9744'23", 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 1999 TO SEPTEMBER 2000

                                               COL-                SPE-     PH       PH                     
                                               LECTOR    SPE-     CIFIC    WATER    WATER             MAGNE-
                                      PRECIP-   EFFI-    CIFIC     CON-    WHOLE    WHOLE   CALCIUM    SIUM,
                                      ITATION  CIENCY    CON-     DUCT-    FIELD     LAB     DIS-      DIS- 
                                       TOTAL    WET      DUCT-    ANCE    (STAND-  (STAND-   SOLVED   SOLVED
                                      INCHES/  DEPOS.    ANCE      LAB      ARD      ARD     (MG/L    (MG/L 
                      PERIOD OF        WEEK    PERCENT  (US/CM)  (US/CM)   UNITS)   UNITS)   AS CA)   AS MG)
                     COLLECTION       (00046)  (82284)  (00095)  (90095)  (00400)  (00403)  (00915)  (00925)

                   09/28 to 10/05     b<.01      100       --       --       --       --       --       --  
                   10/05 to 10/12      <.01     >200       --      a35       --     a7.1    a2.43     a.337 
                   10/12 to 10/19       .22       50       11       11      6.3      6.3      .269     .049 
                   10/19 to 10/26       .00       --       --       --       --       --       --       --  
                   10/26 to 11/02       .00       --       --       --       --       --       --       --

                   11/02 to 11/09       .00       --       --       --       --       --       --       --  
                   11/09 to 11/16       .00       --       --       --       --       --       --       --  
                   11/16 to 11/23      b.02      <50       --       --       --       --       --       --  
                   11/23 to 11/30       .05       60       --        7       --      6.1      .328     .071 
                   11/30 to 12/07      b.03      100       --        6       --      5.9       --       --  

                   12/07 to 12/14       .15       40        6        6      6.4      6.0      .226     .044 
                   12/14 to 12/21       .20       20        6        6      6.3      5.8      .107     .024 
                   12/21 to 12/28       .02       50       --        7       --      6.0      .066     .010 
                   12/28 to 01/04        --       --       --        5       --      6.1     <.050    <.017 
                   01/04 to 01/11        --       --       --       --       --       --       --       --  

                   01/11 to 01/18        --       --       --        9       --      5.0      .19      .023 
                   01/18 to 01/25      b.05      <20       --       --       --       --       --       --  
                   01/25 to 02/01       .00       --       --       --       --       --       --       --  
                   02/01 to 02/08      b.00       --       --       --       --       --       --       --  
                   02/08 to 02/15      b.07      <14       --        6       --      5.8       --       --  

                   02/15 to 02/22      b.00       --       --       --       --       --       --       --  
                   02/22 to 02/29       .97       88        6        6      5.9      5.4      .041     .004 
                   02/29 to 03/07       .03      133       --       34       --      6.6     1.72      .271 
                   03/07 to 03/14      b.00       --       --       --       --       --       --       --  
                   03/14 to 03/21      b.02       50       --        6       --      6.4       --       --  

                   03/21 to 03/28       .60       83       15       13      6.1      5.2      .041     .007 
                   03/28 to 04/04       .10       80       10        9      6.7      6.2      .253     .050
                   04/04 to 04/11       .07       71       --        6       --      6.0      .113     .018 
                   04/11 to 04/18       .04       25       --      a19       --     a6.4     a.497    a.064 
                   04/18 to 04/25       .00       --       --       --       --       --       --       --  

                   04/25 to 05/02       .03       33       --      a28       --     a6.6    a1.26     a.200 
                   05/02 to 05/09       .86       97       30       35      6.4      7.0      .364     .082 
                   05/09 to 05/16       .64      102        8        8      6.3      6.5      .088     .015 
                   05/16 to 05/23       .14      121       18       20      6.6      6.6     1.35      .276 
                   05/23 to 05/30       .00       --       --       --       --       --       --       --  

                   05/30 to 06/06       .20       95       12       11      5.9      6.0      .439     .091 
                   06/06 to 06/13      1.28       99        7        8      5.9      6.3      .255     .045 
                   06/13 to 06/20      2.7       102        5        5      5.9      6.0      .069     .012 
                   06/20 to 06/27      1.03       92        6        6      5.3      5.5      .150     .034 
                   06/27 to 07/04       .00       --       --       --       --       --       --       --  

                   07/04 to 07/11       .75      100       13       13      6.0      6.4      .400     .059 
                   07/11 to 07/18       .70      104       11       10      5.8      6.2      .332     .068 
                   07/18 to 07/25       .00       --       --       --       --       --       --       --  
                   07/25 to 08/01       .20      115       --       23       --      6.7      .690     .127 
                   08/01 to 08/08      1.73      107        6        7      5.9      6.2      .120     .024 

                   08/08 to 08/15      1.27      100       11       11      5.7      6.4      .372     .055 
                   08/15 to 08/22       .65      100       12       12       --      6.3      .376     .043 
                   08/22 to 08/29      2.34      100       12        7      4.7      5.8      .142     .015 
                   08/29 to 09/05      1.48       93       11       11      4.6      5.6      .288     .026 
                   09/05 to 09/12       .15      107       26       25      6.4      6.6     1.59      .119 
                   09/12 to 09/19       .25       84       --       30       --      6.9      .200     .040 


                                                                               NITRO-   NITRO-         
                                                    POTAS-            CHLO-     GEN,     GEN,    PHOS- 
                                          SODIUM,    SIUM,  SULFATE   RIDE,   NITRATE  AMMONIA  PHORUS 
                                           DIS-      DIS-    DIS-     DIS-      DIS-     DIS-     DIS- 
                                          SOLVED    SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED
                                           (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L 
                          PERIOD OF        AS NA)   AS K)   AS SO4)   AS CL)   AS N)    AS N)    AS P) 
                         COLLECTION       (00930)  (00935)  (00945)  (00940)  (00618)  (00608)  (00666)

                       09/28 to 10/05        --       --       --       --       --       --       --  
                       10/05 to 10/12      a.140    a.237    a4.4     a.26    a1.28    a1.58    a<.003 
                       10/12 to 10/19       .023     .058     1.3      .09      .310     .710    <.001 
                       10/19 to 10/26        --       --       --       --       --       --       --  
                       10/26 to 11/02        --       --       --       --       --       --       --

                       11/02 to 11/09        --       --       --       --       --       --       --  
                       11/09 to 11/16        --       --       --       --       --       --       --  
                       11/16 to 11/23        --       --       --       --       --       --       --  
                       11/23 to 11/30       .016     .025      .71     .04      .201     .260    <.001 
                       11/30 to 12/07        --       --       --       --       --       --       --  

                       12/07 to 12/14       .037     .035      .33     .04      .323     .300    <.001 
                       12/14 to 12/21       .012     .020      .46    <.03      .218     .260    <.001 
                       12/21 to 12/28       .009     .003     <.03     .14      .040     .030    <.001 
                       12/28 to 01/04      <.017    <.017      .33    <.02      .090     .310      --  
                       01/04 to 01/11        --       --       --       --       --       --       --  

                       01/11 to 01/18       .041     .014      .33     .15      .360     .130      --  
                       01/18 to 01/25        --       --       --       --       --       --       --  
                       01/25 to 02/01        --       --       --       --       --       --       --  
                       02/01 to 02/08        --       --       --       --       --       --       --  
                       02/08 to 02/15        --       --       --       --       --       --       --  

                       02/15 to 02/22        --       --       --       --       --       --       --  
                       02/22 to 02/29       .010     .006      .50    <.03      .165     .290    <.001 
                       02/29 to 03/07       .536     .093     4.9      .57      .854    1.52     <.001 
                       03/07 to 03/14        --       --       --       --       --       --       --  
                       03/14 to 03/21        --       --       --       --       --       --       --  

                       03/21 to 03/28       .005     .009     1.5      .03      .500     .78     <.001 
                       03/28 to 04/04       .040     .039      .92     .07      .309     .630    <.001 
                       04/04 to 04/11       .017     .017      .61     .04      .177     .360    <.001 
                       04/11 to 04/18      a.091    a.021    a2.8     a.11     a.450   a1.16    a<.001 
                       04/18 to 04/25        --       --       --       --       --       --       --  

                       04/25 to 05/02      a.107    a.093    a2.2     a.20    a1.095   a1.73    a<.001 
                       05/02 to 05/09       .060    1.68      1.8      .43      .367    2.73     1.139 
                       05/09 to 05/16       .018     .036      .52    <.03      .179     .780    <.001 
                       05/16 to 05/23       .123     .202     1.9      .06      .437     .860    <.001 
                       05/23 to 05/30        --       --       --       --       --       --       --  

                       05/30 to 06/06       .043     .049     1.2      .09      .453     .590    <.001 
                       06/06 to 06/13       .017     .032      .52     .04      .242     .410    <.001 
                       06/13 to 06/20       .008     .015      .47    <.03      .160     .360    <.001 
                       06/20 to 06/27       .009     .018      .68     .03      .165     .220    <.001 
                       06/27 to 07/04        --       --       --       --       --       --       --  

                       07/04 to 07/11       .061     .110      .80     .09      .351     .920    <.001 
                       07/11 to 07/18       .032     .053      .74     .09      .437     .670    <.001 
                       07/18 to 07/25        --       --       --       --       --       --       --  
                       07/25 to 08/01       .063     .630     1.4      .17      .467    1.23      .017 
                       08/01 to 08/08      <.003     .024      .46    <.03      .132     .480    <.001 

                       08/08 to 08/15       .071     .060      .80     .08      .276     .530    <.001 
                       08/15 to 08/22       .034     .079      .94     .08      .400     .810    <.001 
                       08/22 to 08/29       .014     .024      .67     .03      .233     .470    <.001 
                       08/29 to 09/05       .021     .026     1.3      .05      .402     .560    <.001 
                       09/05 to 09/12       .053     .110     2.7      .13      .933    1.16     <.001 
                       09/12 to 09/19       .098    1.31      1.4      .39      .127    3.03      .702 

                       1  The use of brand names in this report is for identification purposes only and
                          does not imply endorsement by the U.S. Geological Survey.
                       a  To provide for an adequate sample, 50 milliliters of dilution water was added.
                       b  Trace of water collected in field sampler.

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