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Water Quality Samples for the Nation

To view additional data-quality attributes, output the results using these options: one result per row, expanded attributes.
Additional precautions are here.


USGS 06307616 Tongue R at Birney Day School Br nr Birney MT

Rosebud County, Montana
Hydrologic Unit Code 10090102
Latitude  45°24'41.78", Longitude 106°27'26.47" NAD83
Drainage area 2,633  square miles
Gage datum 3,060 feet above NAVD88
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)

Organic
nitro-
gen,
water,
fltrd,
mg/L
(00607)


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-
phorus,
water,
unfltrd
mg/L
as P
(00665)

Phos-
phorus,
water,
fltrd,
mg/L
as P
(00666)
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)
1979-10-02 07:45
MDT
T
WS
USGS-WRD
0.53 0.51     0.010   0.52 0.010   0.010       0.01   0.03 2.3
1979-11-14 14:15
MST
T
WS
USGS-WRD
0.59 0.43     0.050   0.48 0.110   0.020       0.06   0.06 2.6
1979-12-10 15:20
MST
T
WS
USGS-WRD
0.57 0.52     0.010   0.53 0.040   0.010       0.01   0.03 2.5
1980-01-15 12:45
MST
T
WS
USGS-WRD
1.4 1.1     0.120   1.2 0.240   0.040       0.15   0.12 6.4
1980-02-11 12:55
MST
T
WS
USGS-WRD
0.99 0.46     0.060   0.52 0.470   0.010       0.07   0.03 4.4
1980-03-17 14:15
MST
T
WS
USGS-WRD
1.4 1.1     0.000   1.1 0.310   0.000       0.00   0.00 6.2
1980-04-14 13:00
MST
T
WS
USGS-WRD
1.3 1.2     0.020   1.2 0.050   0.080       0.02   0.25 5.5
1980-05-21 09:05
MDT
T
WS
USGS-WRD
0.69 0.64     0.030   0.67 0.020   0.040       0.04   0.12 3.1
1980-06-18 11:00
MDT
T
WS
USGS-WRD
1.3 1.1     0.060   1.2 0.090   0.090       0.07   0.28 5.7
1980-07-21 13:10
MDT
T
WS
USGS-WRD
0.73 0.70     0.010   0.71 0.020   0.050       0.01   0.15 3.2
1980-08-13 07:45
MDT
T
WS
USGS-WRD
1.5 1.5     0.030   1.5 0.000   0.070       0.04   0.21 6.6
1980-09-10 08:30
MDT
T
WS
USGS-WRD
0.85 0.83     0.020   0.85 0.000   0.050       0.02   0.15 3.8
1980-10-02 14:50
MDT
T
WS
USGS-WRD
0.52 0.51     0.000   0.51 0.010   0.030       0.00   0.09 2.3
1980-11-05 08:50
MST
T
WS
USGS-WRD
0.86 0.64     0.150   0.79 0.070   0.070       0.18   0.21 3.8
1980-12-04 14:30
MST
T
WS
USGS-WRD
0.58 0.50     0.080   0.58 0.000   0.050       0.10   0.15 2.6
1981-01-07 10:15
MST
T
WS
USGS-WRD
0.76 0.66     0.000   0.66 0.100   0.030 0.020     0.00   0.09 3.4
1981-02-04 10:50
MST
T
WS
USGS-WRD
0.69 0.65     0.030   0.68 0.010   0.020       0.04   0.06 3.1
1981-03-04 09:15
MST
T
WS
USGS-WRD
1.1 0.89     0.210   1.1 0.000   0.060       0.270   0.18 4.9
1981-04-08 09:20
MST
T
WS
USGS-WRD
0.93 0.74     0.150   0.89 0.040   0.070       0.193   0.21 4.1
1981-05-06 09:00
MDT
T
WS
USGS-WRD
1.8 1.7     0.070   1.8 0.000   0.100       0.090   0.31 8.0
1981-06-03 11:00
MDT
T
WS
USGS-WRD
              0.150   0.140           0.43  
1981-07-08 08:10
MDT
T
WS
USGS-WRD
1.5 1.4     0.100   1.5 0.020   0.040       0.129   0.12 6.7
1981-08-12 08:40
MDT
T
WS
USGS-WRD
0.75 0.60     0.130   0.73 0.020   0.060       0.167   0.18 3.3
1981-09-17 09:15
MDT
T
WS
USGS-WRD
< 0.92 0.72     0.100   0.82 < 0.100   0.020       0.129   0.06 < 4.1
1981-10-06 08:45
MDT
T
WS
USGSNWQL
< 1.7 1.5     0.120   1.6 < 0.100   0.010       0.155   0.03 < 7.5
1981-12-09 12:55
MST
T
WS
USGSNWQL
< 0.92 0.57     0.250   0.82 < 0.100   < 0.010       0.322     < 4.1
1982-01-20 12:45
MST
T
WS
USGSNWQL
0.77 0.35     0.210   0.56 0.210   0.010       0.270   0.03 3.4
1982-03-03 13:25
MST
T
WS
USGS-WRD
1.0 0.53     0.100   0.63 0.410   < 0.010       0.129     4.6
1982-04-14 11:30
MST
T
WS
USGS-WRD
< 0.99 < 0.89     < 0.060   0.89 < 0.100   < 0.010       < 0.077     < 4.4
1982-05-20 09:00
MDT
T
WS
USGS-WRD
< 1.9 1.7     0.140   1.8 < 0.100   0.150       0.180   0.46 < 8.4
1982-07-15 10:30
MDT
T
WS
USGS-WRD
< 1.1 < 1.0     < 0.060   1.0 < 0.100   0.030       < 0.077   0.09 < 4.9
1982-08-26 10:20
MDT
T
WS
USGS-WRD
< 1.3 1.1     0.150   1.2 < 0.100   0.040       0.193   0.12 < 5.8
1982-09-21 09:15
MDT
T
WS
USGS-WRD
< 1.1 0.77     0.230   1.0 < 0.100   0.020       0.296   0.06 < 4.9
1982-11-04 11:15
MST
T
WS
USGS-WRD
< 0.60 0.29     0.210   0.50 < 0.100   0.010       0.270   0.03 < 2.7
1982-12-15 11:00
MST
T
WS
USGS-WRD
< 0.80 0.60     0.100   0.70 < 0.100   0.020       0.129   0.06 < 3.5
1983-01-27 11:15
MST
T
WS
USGS-WRD
0.60 0.44     0.060   0.50 0.100   0.020       0.077   0.06 2.7
1983-03-03 08:25
MST
T
WS
USGS-WRD
< 1.2 0.94     0.160   1.1 < 0.100   0.050       0.206   0.15 < 5.3
1983-04-21 08:20
MST
T
WS
USGS-WRD
< 1.1 0.53     0.470   1.0 < 0.100   0.040       0.605   0.12 < 4.9
1983-06-09 12:30
MDT
T
WS
USGS-WRD
< 2.8 2.5     0.160   2.7 < 0.100   0.070       0.206   0.21 < 12
1983-07-11 11:15
MDT
T
WS
USGS-WRD
< 0.70 0.53     0.070   0.60 < 0.100   0.060       0.090   0.18 < 3.1
1983-08-15 12:05
MDT
T
WS
USGS-WRD
< 1.0 0.84     0.060   0.90 < 0.100   0.110       0.077   0.34 < 4.4
1983-09-20 11:20
MDT
T
WS
USGS-WRD
< 0.60 0.42     0.080   0.50 < 0.100   0.010       0.103   0.03 < 2.7
1983-10-03 11:55
MDT
T
WS
USGS-WRD
< 0.80 0.56     0.140   0.70 < 0.100   0.010       0.180   0.03 < 3.5
1983-11-14 11:00
MST
T
WS
USGS-WRD
< 0.80 0.63     0.070   0.70 < 0.100   0.010       0.090   0.03 < 3.5
1983-12-27 12:30
MST
T
WS
USGS-WRD
0.50 0.25     0.050   0.30 0.200   < 0.010       0.064     2.2
1984-02-13 11:50
MST
T
WS
USGS-WRD
0.60 0.32     0.080   0.40 0.200   0.010       0.103   0.03 2.7
1984-03-19 11:30
MST
T
WS
USGS-WRD
0.70 0.56     0.040   0.60 0.100   0.030       0.052   0.09 3.1
1984-04-18 11:00
MST
T
WS
USGS-WRD
< 0.60 0.42     0.080   0.50 < 0.100   0.030       0.103   0.09 < 2.7
1984-05-23 10:25
MDT
T
WS
USGS-WRD
0.50 0.12     0.080   0.20 0.300   0.180       0.103   0.55 2.2
1984-07-11 09:25
MDT
T
WS
USGS-WRD
< 0.60 0.44     0.060   0.50 < 0.100   0.020       0.077     < 2.7
1984-08-29 09:45
MDT
T
WS
USGS-WRD
< 0.30 < 0.18     0.020   < 0.20 < 0.100   0.040       0.026     < 1.3
1984-10-17 10:00
MDT
T
WS
USGS-WRD
0.60 0.39     0.010   0.40 0.200   0.010       0.013     2.7
1984-11-07 12:15
MST
T
WS
USGS-WRD
< 0.70 0.57     0.030   0.60 < 0.100   0.010       0.039     < 3.1
1985-01-29 09:45
MST
T
WS
USGS-WRD
0.80 0.32     0.080   0.40 0.400   0.010       0.103     3.5
1985-04-08 11:05
MST
T
WS
USGS-WRD
< 1.0 0.86     0.04   0.90 < 0.10   0.04       0.052     < 4.4
1985-05-15 09:45
MDT
T
WS
USGS-WRD
< 0.60 0.45     0.05   0.50 < 0.10   0.07       0.064     < 2.7
1985-06-25 10:25
MDT
T
WS
USGS-WRD
< 0.60 0.46     0.04   0.50 < 0.10   0.03       0.052   0.09 < 2.7
1985-07-24 10:05
MDT
T
WS
USGS-WRD
< 0.80 0.67     0.03   0.70 < 0.10   0.06       0.039   0.18 < 3.5
1985-08-13 11:20
MDT
T
WS
USGS-WRD
< 0.50 0.36     0.04   0.40 < 0.10   0.03       0.052   0.09 < 2.2
1985-09-25 10:10
MDT
T
WS
USGS-WRD
< 0.70 0.53     0.07   0.60 < 0.10   0.03       0.090   0.09 < 3.1
1985-10-15 11:20
MDT
T
WS
USGS-WRD
< 0.60 0.46     0.04   0.50 < 0.10   < 0.01       0.052     < 2.7
1985-11-06 12:35
MST
T
WS
USGS-WRD
< 0.50 0.36     0.04   0.40 < 0.10   0.01       0.052   0.03 < 2.2
1985-12-19 13:50
MST
T
WS
USGS-WRD
0.90 0.34     0.36   0.70 0.20   0.01       0.464     4.0
1986-01-31 10:55
MST
T
WS
USGS-WRD
0.50 0.36     0.04   0.40 0.10   0.01       0.052     2.2
1986-03-05 10:10
MST
T
WS
USGS-WRD
1.1 0.65     0.15   0.80 0.30   0.09       0.193     4.9
1986-04-16 13:10
MST
T
WS
USGS-WRD
< 1.2 1.0     0.09   1.1 < 0.10   0.08       0.116     < 5.3
1986-06-06 10:40
MDT
T
WS
USGS-WRD
< 1.7 1.4     0.21   1.6 < 0.10   0.67       0.270     < 7.5
1986-07-18 10:20
MDT
T
WS
USGS-WRD
< 0.60 0.46     0.04   0.50 < 0.10   0.05       0.052     < 2.7
1986-08-13 11:55
MDT
T
WS
USGS-WRD
< 0.60 < 0.50     < 0.01   0.50 < 0.10   0.03       < 0.013     < 2.7
1987-03-26 13:15
MST
T
WS
USGS-WRD
                < 0.100                
1987-05-13 11:55
MDT
T
WS
USGS-WRD
                < 0.100                
1987-08-05 11:30
MDT
T
WS
USGS-WRD
                < 0.100                
1987-11-04 12:00
MST
T
WS
USGS-WRD
                < 0.100                
1988-04-19 12:25
MDT
T
WS
USGS-WRD
                < 0.100                
1988-05-25 16:00
MDT
T
WS
USGS-WRD
                0.130                
1988-06-08 10:00
MDT
T
WS
USGS-WRD
                0.140                
1988-11-16 11:45
MST
T
WS
USGS-WRD
                < 0.100                
1989-04-05 14:50
MDT
T
WS
USGS-WRD
                < 0.100                
1989-06-22 15:15
MDT
T
WS
USGS-WRD
                < 0.100                
1989-09-07 14:30
MDT
T
WS
USGS-WRD
                < 0.100                
1989-10-18 14:30
MDT
T
WS
USGS-WRD
                < 0.100                
1990-05-30 13:00
MDT
T
WS
USGS-WRD
                < 0.100                
1991-03-20 14:45
MST
T
WS
USGS-WRD
      < 0.010   < 0.010     < 0.050     < 0.01     < 0.013    
1991-05-24 14:30
MDT
T
WS
USGS-WRD
      0.080   0.020     0.220     < 0.01     0.103    
1991-08-14 15:00
MDT
T
WS
USGS-WRD
      0.100   < 0.010     < 0.050     < 0.01     0.129    
1992-03-25 14:30
MST
T
WS
USGS-WRD
      0.010   < 0.010     < 0.050     < 0.01     0.013    
1992-06-26 11:00
MDT
T
WS
USGS-WRD
      0.040   < 0.010     0.095     < 0.01     0.052    
1992-08-12 12:45
MDT
T
WS
USGS-WRD
      0.010   < 0.010     < 0.050     0.01     0.013    
1993-03-24 13:45
MST
T
WS
USGS-WRD
      0.020   < 0.010     0.140     < 0.01     0.026    
1993-05-11 14:15
MDT
T
WS
USGS-WRD
      0.010   < 0.010     < 0.050     < 0.01     0.013    
1993-06-30 15:30
MDT
T
WS
USGS-WRD
      0.030   < 0.010     < 0.050     < 0.01     0.039    
2004-02-05 10:30
MST
K
WS
USGS-WRD
  < 0.22   < 0.010   0.003     0.033 0.008   < 0.006 0.26   < 0.013    
2004-03-10 10:00
MST
K
WS
USGS-WRD
  < 0.26   < 0.010   < 0.002     < 0.016 0.016   < 0.006 0.26   < 0.013    
2004-04-13 12:45
MDT
K
WS
USGS-WRD
  < 0.26   < 0.010   < 0.002     < 0.016 0.011   < 0.006 0.26   < 0.013    
2004-04-26 12:15
MDT
K
WS
USGS-WRD
  < 0.27   < 0.010   < 0.002     < 0.016 0.012   < 0.006 0.27   < 0.013    
2004-05-12 14:15
MDT
K
WS
USGS-WRD
  < 0.35   < 0.010   E 0.001     < 0.016 0.025   < 0.006 0.35   < 0.013    
2004-05-25 12:00
MDT
K
WS
USGS-WRD
  < 0.25   < 0.010   < 0.002     < 0.016 0.030   < 0.006 0.25   < 0.013    
2004-06-08 12:00
MDT
K
WS
USGS-WRD
  < 0.24   < 0.010   E 0.001     < 0.016 0.031   < 0.006 0.24   < 0.013    
2004-06-23 10:15
MDT
K
WS
USGS-WRD
  < 0.28   < 0.010   < 0.002     < 0.016 0.019   < 0.006 0.28   < 0.013    
2004-07-26 16:30
MDT
K
WS
USGS-WRD
  < 0.38   < 0.010   < 0.002     < 0.016 0.026   < 0.006 0.38   < 0.013    
2004-08-23 14:40
MDT
K
WS
USGS-WRD
  E 0.51   E 0.006   E 0.001     E 0.009 0.127   < 0.006 0.53   E 0.008    
2004-10-13 09:45
MDT
K
WS
USGS-WRD
  < 0.22   < 0.010   < 0.002     < 0.016 0.008   < 0.006 0.22   < 0.013    
2004-12-08 10:05
MST
K
WS
USGS-WRD
  < 0.26   E 0.005   < 0.002     < 0.016 0.008   E 0.003 0.27   E 0.006    
2005-02-08 12:15
MST
K
WS
USGS-WRD
  < 0.22   E 0.008   E 0.001     < 0.016 0.009   < 0.006 0.23   E 0.010    
2005-04-05 12:00
MDT
K
WS
USGS-WRD
  < 0.30   E 0.008   < 0.002     < 0.016 0.018   < 0.006 0.31   E 0.010    
2005-05-16 13:00
MDT
K
WS
USGS-WRD
  < 0.82   E 0.007   E 0.001     < 0.016 0.110   < 0.006 0.82   E 0.009    
2005-08-24 12:10
MDT
K
WS
USGS-WRD
  E 0.32   E 0.005   E 0.001     E 0.008 0.037   < 0.006 0.33   E 0.006    
2005-10-18 10:15
MDT
K
WS
USGS-WRD
  < 0.26   < 0.010   E 0.001     < 0.016 0.015   < 0.006 0.26   < 0.013    
2005-12-06 10:30
MST
K
WS
USGS-WRD
  E 0.26   E 0.005   E 0.001     E 0.008 0.013   < 0.006 0.28   E 0.006    
2006-03-08 11:15
MST
K
WS
USGS-WRD
  < 0.25   < 0.010   < 0.002     < 0.016 0.009   < 0.006 0.25   < 0.013    
2006-04-04 17:45
MDT
K
WS
USGS-WRD
  < 0.26   E 0.005   E 0.001     < 0.016 0.016   < 0.006 0.27   E 0.006    
2006-05-16 11:45
MDT
K
WS
USGS-WRD
  < 0.38   < 0.010   < 0.002     < 0.016 0.031   < 0.006 0.38   < 0.013    
2006-08-08 09:45
MDT
K
WS
USGS-WRD
  < 0.25   < 0.010   < 0.002     < 0.016 0.018   E 0.004 0.25   < 0.013    
2006-10-03 10:30
MDT
K
WS
USGS-WRD
  E 0.26   E 0.014   < 0.002     E 0.008 E 0.007   < 0.006 0.29   E 0.019    
2007-02-15 09:45
MST
K
WS
USGS
  0.25   0.095   0.007     0.160 0.009   E 0.004 0.50   0.122    
2007-04-11 11:30
MDT
K
WS
USGS-WRD
  < 0.95   < 0.02   < 0.002     < 0.016 0.087   E 0.003 0.95   < 0.026    
2007-05-23 12:00
MDT
K
WS
USGS-WRD
  0.46   0.03   0.004     0.090 0.081   0.010 0.58   0.034    
2007-08-06 10:15
MDT
K
WS
USGS-WRD
  < 0.32   < 0.02   < 0.002     < 0.016 0.044   0.013 0.32   < 0.026    
2008-04-22 15:30
MDT
K
WS
USGS-WRD
  < 0.35   < 0.02   < 0.002     < 0.016 0.019   E 0.004 0.35   < 0.026    
2008-06-04 14:30
MDT
K
WS
USGS-WRD
  < 0.51   < 0.02   E 0.002     0.025 0.130   0.007 0.54   < 0.026    
2008-07-08 16:15
MDT
K
WS
USGS-WRD
  < 0.33   < 0.02   < 0.002     E 0.009 0.056   0.008 0.34   < 0.026    
2009-04-10 13:30
MDT
K
WS
USGS-WRD
  0.45   0.02   0.003     0.087 0.060   E 0.006 0.56   0.028    
2009-06-24 14:45
MDT
K
WS
USGS
  < 0.34   < 0.02   < 0.002     < 0.016 0.056   E 0.006 0.34   < 0.026    
2009-07-07 17:00
MDT
K
WS
USGS-WRD
  < 0.28   < 0.02   E 0.001     < 0.016 0.036   E 0.005 0.28   < 0.026    
2010-05-05 15:00
MDT
K
WS
USGS
  < 0.47   < 0.02   < 0.002     < 0.016 0.048   < 0.008 0.47   < 0.026    
2010-06-10 17:00
MDT
K
WS
USGS-WRD
  < 0.43   < 0.02   E 0.001     0.018 0.108   0.008 0.45   < 0.026    
2010-07-14 18:30
MDT
K
WS
USGS
  < 0.28   < 0.02   < 0.002     E 0.010 0.044   E 0.005 0.29   < 0.026    
2011-05-10 15:00
MDT
K
WS
USGS
  < 0.55   0.01   < 0.001     < 0.008 0.065   0.005 0.57   0.016    
2011-06-07 12:30
MDT
K
WS
USGS
  0.61   0.02   0.005     0.252 0.103   0.023 0.88   0.021    
2011-07-14 16:00
MDT
K
WS
USGS-WRD
  0.31   0.01   0.008     0.109 0.081   0.014 0.43   0.017    
2012-05-07 11:00
MDT
K
WS
USGS-WRD
  < 0.45   < 0.01   < 0.001     < 0.01 0.031   < 0.004 0.45   < 0.013    
2012-06-05 15:15
MDT
K
WS
USGS-WRD
  < 0.69   < 0.01   < 0.001     < 0.01 0.158   < 0.004 0.69   < 0.013    
2012-07-17 11:00
MDT
K
WS
USGS-WRD
  < 0.37   < 0.01   0.001     0.02 0.065   < 0.004 0.39   < 0.013    
2013-06-04 13:45
MDT
K
WS
USGS-WRD
0.61 0.67 0.21 0.01   0.001     0.02 0.105   < 0.004 0.70   0.014    
2013-07-23 10:15
MDT
K
WS
USGS-WRD
0.30 < 0.37 < 0.22 < 0.01   < 0.001     < 0.01 0.030   < 0.004 0.37   < 0.013    
2013-08-15 12:00
MDT
K
WS
USGS-WRD
0.32 < 0.30 < 0.23 < 0.01   < 0.001     < 0.01 0.034   < 0.004 0.30   < 0.013    
2014-07-08 11:00
MDT
K
WS
USGS-WRD
0.37 < 0.36 < 0.22 < 0.01   < 0.001     < 0.01 0.047   < 0.004 0.36   < 0.013    
2014-08-04 11:45
MDT
K
WS
USGS-WRD
0.40 < 0.36 < 0.22 < 0.01   < 0.001     0.01 0.054   0.007 0.38   < 0.013    
2014-09-23 14:15
MDT
K
WS
USGS-WRD
0.36 < 0.37 < 0.21 < 0.01   < 0.001     < 0.01 0.037   < 0.004 0.37   < 0.013    
2015-06-17 09:00
MDT
K
WS
USGS-WRD
  < 0.45   < 0.01   0.002     0.06 0.060   0.011 0.51   < 0.013    
2015-07-16 10:10
MDT
K
WS
USGS-WRD
  < 0.39   < 0.01   < 0.001     < 0.01 0.042   < 0.004 0.39   < 0.013    
2015-08-19 15:20
MDT
K
WS
USGS-WRD
  < 0.33   < 0.01   < 0.001     < 0.01 0.033   < 0.004 0.33   < 0.013    
2016-07-26 15:10
MDT
K
WS
USGS-WRD
  < 0.23   < 0.01   < 0.001     < 0.01 0.027   < 0.004 0.23   < 0.013    
2016-08-24 15:40
MDT
K
WS
USGS-WRD
  < 0.28   < 0.01   < 0.001     < 0.01 0.021   < 0.004 0.28   < 0.013    
2016-09-21 13:30
MDT
K
WS
USGS-WRD
  < 0.30   < 0.01   < 0.001     < 0.01 0.012   < 0.004 0.30   < 0.013    

Water Quality Remark Code Description
< less than
E estimated