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Water Quality Samples for the Nation

! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.
To view additional data-quality attributes, output the results using these options: one result per row, expanded attributes.
Additional precautions are here.

USGS 06307830 Tongue R bl Brandenberg bridge nr Ashland MT

Rosebud County, Montana
Hydrologic Unit Code 10090102
Latitude  45°50'25.39", Longitude 106°13'24.36" NAD83
Drainage area 3,879  square miles
Gage datum 2,760 feet above NGVD29
Output formats
Parameter Group Period of Record table
Inventory of available water-quality data for printing
Inventory of water-quality data with retrieval
Tab-separated data, one result per row
Tab-separated data one sample per row with remark codes combined with values
Tab-separated data one sample per row with tab-delimiter for remark codes
Reselect output format
Sample
Datetime		 Time
datum 		 Time
datum
reliability
code 		 Sample
Medium
Code 		 Agency
Collecting
Sample,
Code 
Total
nitro-
gen,
water,
unfltrd
mg/L
(00600)
Organic
nitro-
gen,
water,
unfltrd
mg/L
(00605)

Ammonia
water,
fltrd,
mg/L
as N
(00608)

Ammonia
water,
unfltrd
mg/L
as N
(00610)

Nitrite
water,
fltrd,
mg/L
as N
(00613)		 Ammonia
+
org-N,
water,
unfltrd
mg/L
as N
(00625)		 Nitrate
+
nitrite
water
unfltrd
mg/L
as N
(00630)		 Nitrate
+
nitrite
water,
fltrd,
mg/L
as N
(00631)

Phos-
phate,
water,
unfltrd
mg/L
(00650)
Phos-
phorus,
water,
unfltrd
mg/L
as P
(00665)		 Ortho-
phos-
phate,
water,
fltrd,
mg/L
as P
(00671)		 Total
nitro-
gen,
wat unf
by anal
ysis,
mg/L
(62855)


Ammonia
water,
unfltrd
mg/L
(71845)


Ammonia
water,
fltrd,
mg/L
(71846)
Phos-
phorus,
water,
unfltrd
mg/L
as PO4
(71886)		 Total
nitro-
gen,
water,
unfltrd
mg/L
as NO3
(71887)
1974-04-10 14:30
 MDT
 T
 WS
0.63 0.47   0.100   0.57 0.060     0.040     0.129     2.8
1974-05-10 09:00
 MDT
 T
 WS
0.68 0.61   0.060   0.67 0.010     0.070     0.077     3.0
1974-06-13 11:00
 MDT
 T
 WS
1.0 0.90   0.080   0.98 0.070     0.260     0.103     4.6
1974-07-16 15:00
 MDT
 T
 WS
0.43 0.24   0.100   0.34 0.090     0.220     0.129     1.9
1974-08-26 14:15
 MDT
 T
 WS
0.69 0.57   0.120   0.69 < 0.100     0.030     0.155     3.1
1974-09-17 12:30
 MDT
 T
 WS
0.82 0.57   0.180   0.75 0.070     0.020     0.232     3.6
1974-10-01 14:00
 MDT
 T
 WS
0.62 0.42   0.070   0.49 0.130     0.020     0.090     2.7
1974-11-19 13:30
 MST
 T
 WS
0.31 0.30   0.010   0.31 < 0.100     0.010     0.013     1.4
1974-12-17 12:15
 MST
 T
 WS
0.31 0.27   0.030   0.30 0.010     0.010     0.039     1.4
1975-01-29 14:30
 MST
 T
 WS
0.81 0.72   0.030   0.75 0.060     0.060     0.039     3.6
1975-02-20 10:15
 MST
 T
 WS
0.37 0.25   0.040   0.29 0.080     0.010     0.052     1.6
1975-03-05 17:00
 MDT
 T
 WS
2.0 1.7   0.200   1.9 0.140     0.300     0.258     9.0
1975-04-24 12:00
 MDT
 T
 WS
0.69 0.68   0.010   0.69 < 0.100     0.100     0.013     3.1
1975-05-23 08:45
 MDT
 T
 WS
1.6 1.5   0.040   1.5 0.090     0.170     0.052     7.0
1975-06-19 18:40
 MDT
 T
 WS
0.92 0.73   0.080   0.81 0.110     0.160     0.103     4.1
1975-07-23 09:30
 MDT
 T
 WS
0.49 0.40   0.030   0.43 0.060     0.100     0.039     2.2
1975-08-21 08:30
 MDT
 T
 WS
0.34 0.32   < 0.010   0.32 0.020     0.020     < 0.013     1.5
1975-09-24 10:45
 MDT
 T
 WS
0.35 0.34   < 0.010   0.34 0.010     < 0.010     < 0.013     1.6
1975-10-23 13:00
 MDT
 T
 WS
0.68 0.67   0.010   0.68 < 0.100     0.010     0.013     3.0
1975-11-12 10:30
 MST
 T
 WS
0.41 0.32   0.040   0.36 0.050     < 0.010     0.052     1.8
1975-12-18 11:00
 MST
 T
 WS
0.44 0.41   0.010   0.42 0.020     < 0.010     0.013     1.9
1976-01-22 10:30
 MST
 T
 WS
0.59 0.50   0.010   0.51 0.080     0.010     0.013     2.6
1976-02-25 11:00
 MST
 T
 WS
1.1 1.1   0.030   1.1 0.020     0.020     0.039     5.0
1976-03-18 10:00
 MST
 T
 WS
      0.020     0.080     0.060     0.026      
1976-04-22 10:00
 MST
 T
 WS
0.50 0.47   < 0.010   0.47 0.030     0.030     < 0.013     2.2
1976-05-20 11:00
 MDT
 T
 WS
0.60 0.60   < 0.010   0.60 < 0.100     0.080     < 0.013     2.7
1976-06-29 13:30
 MDT
 T
 WS
0.80 0.73   0.020   0.75 0.050     0.130     0.026     3.5
1976-07-21 09:45
 MDT
 T
 WS
0.10         0.07 0.030     0.040           0.4
1976-08-18 12:15
 MDT
 T
 WS
0.64 0.64   < 0.010   0.64 < 0.100     0.050     < 0.013     2.8
1976-09-28 13:30
 MDT
 T
 WS
0.21 0.05   0.050   0.10 0.110     0.020     0.064     0.9
1976-10-12 11:15
 MDT
 T
 WS
0.24 0.24   < 0.010   0.24 < 0.100     0.030     < 0.013     1.1
1976-11-09 09:40
 MST
 T
 WS
0.39 0.38   < 0.010   0.38 0.010     0.010     < 0.013     1.7
1976-12-07 12:00
 MST
 T
 WS
0.25 0.23   < 0.010   0.23 0.020     0.010     < 0.013     1.1
1977-01-13 13:00
 MST
 T
 WS
0.24 0.23   < 0.010   0.23 0.010     0.020     < 0.013     1.1
1977-02-09 13:45
 MST
 T
 WS
0.63 0.42   0.010   0.43 0.200     0.010     0.013     2.8
1977-03-10 10:45
 MST
 T
 WS
0.45 0.43   < 0.010   0.43 0.020     0.010     < 0.013     2.0
1977-04-13 10:45
 MST
 T
 WS
0.82 0.80   0.020   0.82 < 0.100     0.090     0.026     3.6
1977-05-19 09:15
 MDT
 T
 WS
0.91 0.71   0.070   0.78 0.130     0.240     0.090     4.0
1977-06-20 12:30
 MDT
 T
 WS
0.42 0.33   0.030   0.36 0.060     0.130     0.039     1.9
1977-07-20 10:45
 MDT
 T
 WS
0.17 0.15   0.010   0.16 0.010     0.030     0.013     0.8
1977-08-01 15:40
 MDT
 T
 WS
0.33 0.33   < 0.010   0.33 < 0.100     0.020     < 0.013     1.5
1977-09-06 16:00
 MDT
 T
 WS
2.1 2.1   < 0.010   2.1 < 0.100     0.040     < 0.013     9.3
1977-10-19 12:00
 MDT
 T
 WS
0.60 0.58   0.010   0.59 0.010     0.030     0.013     2.7
1977-12-22 09:15
 MST
 T
 WS
0.33 0.30   0.020   0.32 0.010     0.020     0.026     1.5
1978-03-01 10:30
 MST
 T
 WS
0.28 0.06   < 0.010   0.06 0.220     0.060     < 0.013     1.2
1978-03-22 14:30
 MST
 T
 WS
1.2 0.96   0.140   1.1 0.080     0.270     0.180     5.2
1978-04-20 10:45
 MST
 T
 WS
0.68 0.55   0.030   0.58 0.100     0.060     0.039     3.0
1978-05-17 10:00
 MDT
 T
 WS
1.9 1.8   0.040   1.8 0.080     0.250     0.052     8.3
1978-06-22 08:30
 MDT
 T
 WS
0.96 0.88   0.010   0.89 0.070     0.200     0.013     4.3
1978-07-20 07:45
 MDT
 T
 WS
 USGS-WRD
 0.63 0.50   0.010   0.51 0.120     0.070     0.013     2.8
1978-09-20 08:00
 MDT
 T
 WS
 USGS-WRD
 0.62 0.58   0.030   0.61 0.010     0.030     0.039     2.7
1978-10-05 08:00
 MDT
 T
 WS
 USGS-WRD
 0.53 0.50   0.020   0.52 0.010     0.020     0.026     2.3
1978-12-21 10:30
 MST
 T
 WS
 USGS-WRD
 0.55 0.36   0.010   0.37 0.180     0.010     0.013     2.4
1979-02-21 11:15
 MST
 T
 WS
 USGS-WRD
 1.0 0.43   0.090   0.52 0.490     < 0.010     0.116     4.5
1979-03-29 06:00
 MST
 T
 WS
 USGS-WRD
 0.61 0.38   0.050   0.43 0.180     0.030     0.064     2.7
1979-04-25 07:30
 MST
 T
 WS
 USGS-WRD
 1.9 1.9   0.010   1.9 0.020   0.150 0.050     0.01   0.15 8.5
1979-05-24 08:15
 MDT
 T
 WS
 USGS-WRD
 0.48 0.45   0.030   0.48 < 0.100   0.060 0.020     0.04   0.06 2.1
1979-06-27 08:30
 MDT
 T
 WS
 USGS-WRD
 0.30 0.25   0.040   0.29 0.010     0.070     0.05   0.21 1.3
1979-07-25 08:20
 MDT
 T
 WS
 USGS-WRD
 0.74 0.72   0.010   0.73 0.010     0.030     0.01   0.09 3.3
1979-10-05 09:30
 MDT
 T
 WS
 USGS-WRD
 0.43 0.38   0.030   0.41 0.020     0.010     0.04   0.03 1.9
1979-12-20 15:00
 MST
 T
 WS
 USGS-WRD
 0.70 0.69   0.000   0.69 0.010     0.020     0.00   0.06 3.1
1980-01-16 10:45
 MST
 T
 WS
 USGS-WRD
 1.2 0.98   0.020   1.0 0.230     0.240     0.02   0.74 5.4
1980-03-18 08:00
 MST
 T
 WS
 USGS-WRD
 1.1 0.86   0.000   0.86 0.190     0.030     0.00   0.09 4.6
1980-04-16 07:30
 MST
 T
 WS
 USGS-WRD
 1.1 1.1   0.000   1.1 0.010     0.060     0.00   0.18 4.9
1980-05-20 07:45
 MDT
 T
 WS
 USGS-WRD
 0.76 0.72   0.010   0.73 0.030     0.050     0.01   0.15 3.4
1980-06-17 08:00
 MDT
 T
 WS
 USGS-WRD
 2.0 1.6   0.060   1.7 0.290     0.310     0.07   0.95 8.8
1980-07-23 07:10
 MDT
 T
 WS
 USGS-WRD
 2.4 2.4   0.030   2.4 0.000     0.060     0.04   0.18 11.0
1980-09-09 08:00
 MDT
 T
 WS
 USGS-WRD
 0.69 0.66   0.030   0.69 0.000     0.080     0.04   0.25 3.1
1980-10-02 07:30
 MDT
 T
 WS
 USGS-WRD
 1.7 1.7   0.000   1.7 0.000     0.040     0.00   0.12 7.5
1980-11-04 07:30
 MST
 T
 WS
 USGS-WRD
 0.45 0.43   0.020   0.45 0.000     0.050     0.02   0.15 2.0
1981-01-06 08:00
 MST
 T
 WS
 USGS-WRD
 0.63 0.63   0.000   0.63 0.000     0.020     0.00   0.06 2.8
1981-02-03 09:45
 MST
 T
 WS
 USGS-WRD
 0.72 0.67   0.050   0.72 0.000     0.020     0.06   0.06 3.2
1981-04-07 11:45
 MST
 T
 WS
 USGS-WRD
 1.0 0.86   0.090   0.95 0.070     0.120     0.116   0.37 4.5
1981-05-05 08:05
 MDT
 T
 WS
 USGS-WRD
 0.75 0.66   0.090   0.75 0.000     0.050     0.116   0.15 3.3
1981-06-02 08:20
 MDT
 T
 WS
 USGS-WRD
 1.8 1.5   0.110   1.6 0.190     0.390     0.142   1.2 7.9
1981-07-07 06:50
 MDT
 T
 WS
 USGS-WRD
 0.88 0.72   0.120   0.84 0.040     0.060     0.155   0.18 3.9
1981-09-15 08:00
 MDT
 T
 WS
 USGS-WRD
 < 1.2 0.99   0.110   1.1 < 0.100     0.020     0.142   0.06 < 5.3
2000-06-13 10:30
 MDT
 T
 WS
 USGS-WRD
 0.57       0.001 0.52   0.047   0.100 < 0.001          
2000-06-26 11:15
 MDT
 T
 WS
 USGS-WRD
 < 0.41       0.001 0.41   < 0.005   0.064 < 0.001          
2000-07-19 10:20
 MDT
 T
 WS
 USGS-WRD
 0.33       0.002 0.32   0.009   0.037 0.003          
2000-08-16 09:45
 MDT
 T
 WS
 USGS-WRD
 < 0.38 0.37 0.004     0.37   < 0.005   0.032 0.002     0.005    
2000-10-30 11:50
 MST
 T
 WS
 USGS-WRD
 0.28       < 0.001 0.27   0.006   0.004 E 0.004          
2000-11-21 11:00
 MST
 T
 WS
 USGS-WRD
 0.36       < 0.001 0.35   0.007   0.008 < 0.007          
2000-12-28 14:50
 MST
 T
 WS
 USGS-WRD
 0.45       0.004 0.26   0.191   0.007 < 0.007          
2001-01-11 09:00
 MST
 T
 WS
 USGS-WRD
 0.57       0.003 0.46   0.109   0.018 0.014          
2001-02-12 11:00
 MST
 T
 WS
 USGS-WRD
 0.28       0.001 0.17   0.112   0.007 < 0.007          
2001-03-28 10:15
 MST
 T
 WS
 USGS-WRD
 0.24       0.001 0.23   0.008   0.009 < 0.007          
2001-04-11 10:25
 MDT
 T
 WS
 USGS-WRD
 0.28       < 0.001 0.27   0.009   0.015 < 0.007          
2001-05-23 11:20
 MDT
 T
 WS
 USGS-WRD
 0.45       < 0.001 0.44   0.009   0.031 < 0.007          
2001-06-05 10:30
 MDT
 T
 WS
 USGS-WRD
 67       0.097 67   0.915   21.5 0.374          
2001-07-11 11:00
 MDT
 T
 WS
 USGS-WRD
 0.89       0.002 0.87   0.021   0.098 < 0.007          
2001-08-20 10:50
 MDT
 T
 WS
 USGS-WRD
 0.56       0.001 0.55   0.005   0.047 < 0.007          
2001-09-05 09:20
 MDT
 T
 WS
 USGS-WRD
 0.80       0.001 0.80   0.007   0.100 < 0.007          
2001-10-02 10:00
 MDT
 T
 WS
 USGS-WRD
 < 0.39       < 0.002 0.38   < 0.013   0.039 < 0.007          
2001-11-20 12:10
 MST
 T
 WS
 USGS-WRD
 < 0.39       < 0.002 0.38   < 0.013   0.010 < 0.007          
2001-12-11 14:45
 MST
 T
 WS
 USGS-WRD
 < 0.35       < 0.002 0.34   < 0.013   0.007 < 0.007          
2002-01-15 12:00
 MST
 T
 WS
 USGS-WRD
 < 0.31       < 0.002 0.30   < 0.013   0.010 < 0.007          
2002-02-07 12:30
 MST
 T
 WS
 USGS-WRD
 < 0.29       < 0.002 0.28   < 0.013   0.007 < 0.007          
2002-03-18 16:00
 MST
 T
 WS
 USGS-WRD
 < 0.26       < 0.002 0.25   < 0.013   0.011 < 0.007          
2002-04-23 10:15
 MDT
 T
 WS
 USGS-WRD
 < 0.33       < 0.002 0.32   < 0.013   0.030 < 0.007          
2002-05-29 09:30
 MDT
 T
 WS
 USGS-WRD
 < 0.50       < 0.002 0.48   < 0.013   0.072 < 0.007          
2002-06-05 17:00
 MDT
 T
 WS
 USGS-WRD
 < 0.62       < 0.002 0.61   < 0.013   0.101 < 0.007          
2002-07-10 15:30
 MDT
 T
 WS
 USGS-WRD
 0.89       0.004 0.76   0.128   0.26 < 0.007          
2002-08-13 10:30
 MDT
 T
 WS
 USGS-WRD
 < 0.52       < 0.002 0.51   < 0.013   0.088 < 0.007          
2002-09-10 10:30
 MDT
 T
 WS
 USGS-WRD
 0.99       E 0.002 0.97   0.021   0.28 < 0.007          
2002-10-01 12:00
 MDT
 T
 WS
 USGS-WRD
 < 0.59       E 0.002 0.57   < 0.022   0.058 < 0.007          
2002-11-21 08:15
 MST
 T
 WS
 USGS-WRD
 < 0.27       < 0.002 0.25   < 0.022   0.011 < 0.007          
2002-12-05 08:00
 MST
 T
 WS
 USGS-WRD
 < 0.29       < 0.002 0.27   < 0.022   0.020 < 0.007          
2003-01-07 15:00
 MST
 T
 WS
 USGS-WRD
 < 0.23       < 0.002 0.20   < 0.022   0.012 < 0.007          
2003-02-05 11:00
 MST
 T
 WS
 USGS-WRD
 0.99       0.007 0.67   0.317   0.091 < 0.007          
2003-03-06 10:30
 MST
 T
 WS
 USGS-WRD
 < 0.26       < 0.002 0.24   < 0.022   0.014 < 0.007          
2003-04-23 12:00
 MDT
 K
 WS
 USGS-WRD
 < 0.47       < 0.002 0.45   < 0.022   0.045 < 0.007          
2003-05-05 11:00
 MDT
 K
 WS
 USGS-WRD
 < 0.81       < 0.002 0.79   < 0.022   0.166 < 0.007          
2003-06-16 12:30
 MDT
 K
 WS
 USGS-WRD
 < 0.76       < 0.002 0.74   < 0.022   0.187 < 0.007          
2003-07-02 10:00
 MDT
 K
 WS
 USGS-WRD
 E 0.54       < 0.002 0.53   E 0.019   0.119 < 0.007          
2003-08-04 15:40
 MDT
 K
 WS
 USGS-WRD
 < 0.41       < 0.002 0.39   < 0.022   0.049 < 0.007          
2003-09-02 15:30
 MDT
 K
 WS
 USGS-WRD
 < 0.36       < 0.002 0.34   < 0.022   0.039 < 0.007          
2003-10-07 10:30
 MDT
 K
 WS
 USGS-WRD
         E 0.001     < 0.016   0.011 < 0.006 0.23        
2003-11-13 12:00
 MST
 K
 WS
 USGS-WRD
         < 0.002     < 0.016   0.015 < 0.006 0.24        
2003-12-03 10:15
 MST
 K
 WS
 USGS-WRD
         < 0.002     < 0.016   0.013 < 0.006 0.23        
2004-02-04 10:00
 MST
 K
 WS
 USGS-WRD
   < 0.17 E 0.005   < 0.002     < 0.016   0.004 < 0.006 0.18   E 0.006    
2004-03-10 14:30
 MST
 K
 WS
 USGS-WRD
   < 0.21 < 0.010   < 0.002     < 0.016   0.021 < 0.006 0.21   < 0.013    
2004-04-14 11:00
 MDT
 K
 WS
 USGS-WRD
   < 0.25 < 0.010   < 0.002     < 0.016   0.014 < 0.006 0.25   < 0.013    
2004-04-28 12:30
 MDT
 K
 WS
 USGS-WRD
   < 0.25 < 0.010   < 0.002     < 0.016   0.010 < 0.006 0.25   < 0.013    
2004-05-12 14:00
 MDT
 K
 WS
 USGS-WRD
   < 0.35 < 0.010   < 0.002     < 0.016   0.029 < 0.006 0.35   < 0.013    
2004-05-24 13:00
 MDT
 K
 WS
 USGS-WRD
   < 0.23 < 0.010   < 0.002     < 0.016   0.054 < 0.006 0.23   < 0.013    
2004-06-08 12:15
 MDT
 K
 WS
 USGS-WRD
   < 0.24 < 0.010   E 0.001     < 0.016   0.029 < 0.006 0.24   < 0.013    
2004-06-23 14:30
 MDT
 K
 WS
 USGS-WRD
   < 0.34 < 0.010   < 0.002     < 0.016   0.035 < 0.006 0.34   < 0.013    
2004-07-26 14:00
 MDT
 K
 WS
 USGS-WRD
   < 0.36 < 0.010   < 0.002     < 0.016   0.039 < 0.006 0.36   < 0.013    
2004-08-23 13:00
 MDT
 K
 WS
 USGS-WRD
   < 0.37 < 0.010   < 0.002     < 0.016   0.043 < 0.006 0.37   < 0.013    
2004-10-12 12:30
 MDT
 K
 WS
 USGS-WRD
   < 0.24 < 0.010   < 0.002     < 0.016   0.013 < 0.006 0.24   < 0.013    
2004-12-08 13:00
 MST
 K
 WS
 USGS-WRD
   < 0.30 E 0.005   E 0.001     < 0.016   0.018 < 0.006 0.30   E 0.006    
2005-02-09 10:00
 MST
 K
 WS
 USGS-WRD
   < 0.17 E 0.006   < 0.002     < 0.016   0.007 < 0.006 0.18   E 0.008    
2005-04-06 11:30
 MDT
 K
 WS
 USGS-WRD
   < 0.31 E 0.005   < 0.002     < 0.016   0.024 < 0.006 0.31   E 0.006    
2005-05-16 13:30
 MDT
 K
 WS
 USGS-WRD
   < 1.4 E 0.005   E 0.001     < 0.016   0.30 < 0.006 1.36   E 0.006    
2005-08-23 15:45
 MDT
 K
 WS
 USGS-WRD
   < 0.29 < 0.010   < 0.002     < 0.016   0.036 < 0.006 0.29   < 0.013    
2005-10-04 12:05
 MDT
 K
 WS
 USGS-WRD
   < 0.28 E 0.005   < 0.002     < 0.016   0.017 < 0.006 0.29   E 0.006    
2005-12-13 09:00
 MST
 K
 WS
 USGS-WRD
   < 0.27 < 0.010   < 0.002     < 0.016   0.016 < 0.006 0.27   < 0.013    
2006-03-06 11:45
 MST
 K
 WS
 USGS-WRD
   < 0.17 < 0.010   < 0.002     < 0.016   0.027 < 0.006 0.17   < 0.013    
2006-04-05 15:45
 MDT
 K
 WS
 USGS-WRD
   < 0.25 < 0.010   < 0.002     < 0.016   0.014 < 0.006 0.25   < 0.013    
2006-05-16 15:00
 MDT
 K
 WS
 USGS-WRD
   < 0.36 < 0.010   < 0.002     < 0.016   0.032 < 0.006 0.36   < 0.013    
2006-08-08 14:15
 MDT
 K
 WS
 USGS-WRD
   < 0.30 E 0.006   < 0.002     < 0.016   0.023 E 0.004 0.31   E 0.008    
2006-10-03 13:30
 MDT
 K
 WS
 USGS-WRD
   E 0.20 E 0.011   < 0.002     E 0.008   E 0.008 < 0.006 0.22   E 0.015    
2006-12-06 13:15
 MST
 K
 WS
 USGS-WRD
   < 0.35 < 0.020   < 0.002     < 0.016   0.014 < 0.006 0.35   < 0.026    
2007-02-23 12:30
 MST
 K
 WS
 USGS
   < 0.83 < 0.02   0.013     0.270   0.072 E 0.004 1.10   < 0.026    
2007-04-10 12:30
 MDT
 K
 WS
 USGS-WRD
   < 0.62 < 0.02   < 0.002     < 0.016   0.083 < 0.006 0.62   < 0.026    
2007-05-22 16:00
 MDT
 K
 WS
 USGS-WRD
   0.54 0.03   0.003     0.106   0.159 0.007 0.68   0.036    
2007-08-07 14:30
 MDT
 K
 WS
 USGS-WRD
   < 0.33 < 0.02   E 0.001     < 0.016   0.026 E 0.005 0.33   < 0.026    

Water Quality Remark Code Description
< Less than
E Estimated