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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 06299980 TONGUE RIVER AT MONARCH, WY

Sheridan County, Wyoming
Hydrologic Unit Code 10090101
Latitude  44°54'01", Longitude 107°01'13" NAD27
Drainage area 478  square miles
Contributing drainage area 478  square miles
Gage datum 3,620 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)
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-
phate,
water,
unfltrd
mg/L
(00650)
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)
1974-04-03 16:30
 MDT
 T
 WS
0.36 0.29     0.050   0.34 0.020     0.020       0.064     1.6
1974-05-01 16:30
 MDT
 T
 WS
0.36 0.24     0.100   0.34 0.020     0.080       0.129     1.6
1974-06-04 12:00
 MDT
 T
 WS
                0.130                  
1974-07-09 14:30
 MDT
 T
 WS
0.36 0.30     0.020   0.32 0.040     0.010       0.026     1.6
1974-08-06 11:30
 MDT
 T
 WS
0.76 0.61     0.100   0.71 0.050     0.100       0.129     3.4
1974-09-03 19:20
 MDT
 T
 WS
0.63 0.55     0.050   0.60 0.030     0.050       0.064     2.8
1974-10-08 12:00
 MDT
 T
 WS
0.21 0.18     < 0.010   0.18 0.030     0.040       < 0.013     0.9
1974-11-13 08:45
 MST
 T
 WS
0.01 0.01     < 0.010   0.01 < 0.100     0.030       < 0.013     M 
1974-12-20 12:30
 MST
 T
 WS
0.22 0.08     0.030   0.11 0.110     0.020       0.039     1.0
1975-01-21 11:00
 MST
 T
 WS
2.3 1.8     0.180   2.0 0.260     0.280       0.232     10.0
1975-02-18 10:30
 MST
 T
 WS
0.70 0.40     0.060   0.46 0.240     0.030       0.077     3.1
1975-03-14 14:30
 MDT
 T
 WS
0.55 0.40     0.060   0.46 0.090     0.070       0.077     2.4
1975-04-22 14:45
 MDT
 T
 WS
0.58 0.55     0.030   0.58 < 0.100     0.130       0.039     2.6
1975-05-21 13:20
 MDT
 T
 WS
0.88 0.70     0.020   0.72 0.160     0.130       0.026     3.9
1975-06-17 16:00
 MDT
 T
 WS
0.46 0.39     0.020   0.41 0.050     0.070       0.026     2.0
1975-07-04 10:00
 MDT
 T
 WS
0.59 0.57     < 0.010   0.57 0.020     0.080       < 0.013     2.6
1975-08-08 10:00
 MDT
 T
 WS
0.20 0.19     < 0.010   0.19 0.010     0.010       < 0.013     0.9
1975-09-06 11:00
 MDT
 T
 WS
0.63 0.62     < 0.010   0.62 0.010     0.010       < 0.013     2.8
1975-10-04 09:00
 MDT
 T
 WS
0.51 0.49     0.010   0.50 0.010     0.010       0.013     2.3
1975-11-08 10:00
 MST
 T
 WS
0.27 0.22     < 0.010   0.22 0.050     0.010       < 0.013     1.2
1975-12-06 09:30
 MST
 T
 WS
0.40 0.19     0.040   0.23 0.170     < 0.010       0.052     1.8
1976-01-10 10:30
 MST
 T
 WS
0.71 0.43     0.040   0.47 0.240     < 0.010       0.052     3.1
1976-02-07 10:30
 MST
 T
 WS
0.64 0.37     0.030   0.40 0.240     < 0.010       0.039     2.8
1976-03-08 09:45
 MST
 T
 WS
0.57 0.46     < 0.010   0.46 0.110     < 0.010       < 0.013     2.5
1976-04-10 10:30
 MST
 T
 WS
0.88 0.72     0.080   0.80 0.080     0.020       0.103     3.9
1976-05-07 16:30
 MDT
 T
 WS
1.0 0.75     0.130   0.88 0.130     0.050       0.167     4.5
1976-06-13 09:00
 MDT
 T
 WS
0.45 0.32     0.080   0.40 0.050     0.040       0.103     2.0
1976-07-11 10:30
 MDT
 T
 WS
0.42 0.29     0.030   0.32 0.100     0.010       0.039     1.9
1976-08-06 17:45
 MDT
 T
 WS
0.93 0.75     0.050   0.80 0.130     0.020       0.064     4.1
1976-08-11 08:30
 MDT
 T
 WS
0.22 0.15 0.42 0.020 < 0.010   0.15 0.070 0.010   0.020 0.020     < 0.013 0.03   1.0
1976-09-04 10:30
 MDT
 T
 WS
0.54 0.47     < 0.010   0.47 0.070     < 0.010       < 0.013     2.4
1976-10-02 10:30
 MDT
 T
 WS
0.49 0.49     < 0.010   0.49 < 0.100     0.020       < 0.013     2.2
1976-11-07 16:30
 MST
 T
 WS
0.39 0.20     0.080   0.28 0.110     0.010       0.103     1.7
1976-12-11 08:30
 MST
 T
 WS
0.30 0.09     0.030   0.12 0.180     < 0.010       0.039     1.3
1977-01-11 09:45
 MST
 T
 WS
0.70 0.37     0.010   0.38 0.320     0.010       0.013     3.1
1977-02-07 09:30
 MST
 T
 WS
1.6 1.3     0.070   1.4 0.230     0.010       0.090     7.2
1977-03-07 09:45
 MST
 T
 WS
0.46 0.29     0.060   0.35 0.110     0.010       0.077     2.0
1977-04-03 11:15
 MST
 T
 WS
0.51 0.33     0.040   0.37 0.140     0.050       0.052     2.3
1977-05-01 11:00
 MDT
 T
 WS
1.7 1.2     0.100   1.3 0.360     0.120       0.129     7.3
1977-05-28 10:30
 MDT
 T
 WS
0.45 0.28     0.080   0.36 0.090     0.030       0.103     2.0
1977-07-10 11:30
 MDT
 T
 WS
0.57 0.50     0.040   0.54 0.030     0.020       0.052     2.5
1977-07-21 08:00
 MDT
 T
 WS
0.35 0.34 0.00 < 0.010 0.010   0.35 < 0.100 < 0.100   < 0.010 < 0.010     0.013 0.00   1.6
1977-08-05 10:10
 MDT
 T
 WS
0.57 0.46     0.040   0.50 0.070     0.030       0.052     2.5
1977-09-02 09:00
 MDT
 T
 WS
0.14 0.05     0.040   0.09 0.050     < 0.010       0.052     0.6
1977-10-02 12:15
 MDT
 T
 WS
0.61 0.48     0.040   0.52 0.090     0.020       0.052     2.7
1977-11-12 11:45
 MST
 T
 WS
0.46 0.27     0.110   0.38 0.080     0.020       0.142     2.0
1977-12-11 10:30
 MST
 T
 WS
0.96 0.01     0.080   0.09 0.870     < 0.010       0.103     4.3
1978-01-03 09:30
 MST
 T
 WS
0.74 0.44     0.070   0.51 0.230     < 0.010       0.090     3.3
1978-02-04 11:00
 MST
 T
 WS
0.46 0.21     0.030   0.24 0.220     0.020       0.039     2.0
1978-03-05 10:30
 MST
 T
 WS
0.38 0.08     0.100   0.18 0.200     0.020       0.129     1.7
1978-04-01 09:50
 MST
 T
 WS
1.2 1.1     0.010   1.1 0.100     0.030       0.013     5.3
1978-05-13 11:30
 MDT
 T
 WS
1.5 0.64     0.250   0.89 0.560     0.050       0.322     6.4
1978-06-10 12:15
 MDT
 T
 WS
1.0 0.85     0.090   0.94 0.090     0.130       0.116     4.6
1978-07-22 11:10
 MDT
 T
 WS
 USGS-WRD
 0.44 0.36     < 0.010   0.36 0.080     < 0.010       < 0.013     1.9
1978-08-19 10:10
 MDT
 T
 WS
 USGS-WRD
 0.38 0.34     0.020   0.36 0.020     0.010       0.026     1.7
1978-09-16 10:00
 MDT
 T
 WS
 USGS-WRD
 0.57 0.46     0.080   0.54 0.030     0.010       0.103     2.5
1978-10-14 11:45
 MDT
 T
 WS
 USGS-WRD
 0.84 0.63     0.060   0.69 0.150     0.010       0.077     3.7
1978-10-19 08:10
 MDT
 T
 WS
 USGS-WRD
 0.28 0.25     0.010   0.26 0.020     0.010 0.010     0.013     1.2
1978-11-11 11:10
 MST
 T
 WS
 USGS-WRD
 0.47 0.37     0.030   0.40 0.070     0.010       0.039     2.1
1978-12-09 10:00
 MST
 T
 WS
 USGS-WRD
 0.73 0.42     0.040   0.46 0.270     0.020       0.052     3.2
1979-01-09 09:45
 MST
 T
 WS
 USGS-WRD
 0.59 0.23     0.020   0.25 0.340     0.010       0.026     2.6
1979-02-03 10:15
 MST
 T
 WS
 USGS-WRD
 0.69 0.25     0.110   0.36 0.330     0.020       0.142     3.1
1979-03-17 09:20
 MST
 T
 WS
 USGS-WRD
 1.3 0.73     0.190   0.92 0.340     0.160       0.245     5.6
1979-04-17 09:10
 MST
 T
 WS
 USGS-WRD
 0.46 0.35     0.080   0.43 0.030   0.180 0.060       0.10   0.18 2.0
1979-06-12 12:10
 MDT
 T
 WS
 USGS-WRD
 1.1 0.90     0.080   0.98 0.150   0.060 0.020       0.10   0.06 5.0
1979-07-21 13:00
 MDT
 T
 WS
 USGS-WRD
 0.57 0.54     0.010   0.55 0.020     0.040       0.01   0.12 2.5
1979-08-22 17:10
 MDT
 T
 WS
 USGS-WRD
 0.29 0.23     0.040   0.27 0.020     0.010       0.05   0.03 1.3
1979-09-19 17:40
 MDT
 T
 WS
 USGS-WRD
 0.75 0.59     0.070   0.66 0.090     0.020       0.08   0.06 3.3
1979-10-18 08:40
 MDT
 T
 WS
 USGS-WRD
 0.82 0.72     0.080   0.80 0.020     0.010       0.10   0.03 3.6
1979-11-14 16:50
 MST
 T
 WS
 USGS-WRD
 0.41 0.24     0.010   0.25 0.160     0.010       0.01   0.03 1.8
1979-12-13 08:30
 MST
 T
 WS
 USGS-WRD
 0.64 0.38     0.050   0.43 0.210     0.010       0.06   0.03 2.8
1980-01-17 07:10
 MST
 T
 WS
 USGS-WRD
 1.2 0.85     0.020   0.87 0.280     0.030       0.02   0.09 5.1
1980-02-21 13:20
 MST
 T
 WS
 USGS-WRD
 1.5 0.97     0.230   1.2 0.310     0.060       0.28   0.18 6.7
1980-04-16 13:40
 MST
 T
 WS
 USGS-WRD
 1.1 0.97     0.130   1.1 0.030     0.050       0.16   0.15 5.0
1980-05-14 15:00
 MDT
 T
 WS
 USGS-WRD
 0.80 0.70     0.100   0.80 0.000     0.030       0.12   0.09 3.5
1980-06-11 12:45
 MDT
 T
 WS
 USGS-WRD
 0.64 0.61     0.020   0.63 0.010     0.050       0.02   0.15 2.8
1980-07-10 13:30
 MDT
 T
 WS
 USGS-WRD
 0.77 0.50     0.090   0.59 0.180     0.000       0.11   0.00 3.4
1980-08-11 15:00
 MDT
 T
 WS
 USGS-WRD
 1.9 1.5     0.310   1.8 0.050     0.090       0.38   0.28 8.2
1980-09-09 16:30
 MDT
 T
 WS
 USGS-WRD
 0.41 0.41     0.000   0.41 0.000     0.030       0.00   0.09 1.8
1982-12-14 14:30
 MST
 T
 WS
 USGSNWQL
 < 0.20 < 0.10     < 0.060   < 0.10 0.100     0.040       < 0.077   0.12 < 0.89
1983-01-26 15:00
 MST
 T
 WS
 USGSNWQL
 0.40 < 0.20     < 0.060   0.20 0.200     0.030       < 0.077   0.09 1.8
1983-03-15 12:00
 MST
 T
 WS
 USGSNWQL
 < 0.50 < 0.40     < 0.060   0.40 < 0.100     0.030       < 0.077   0.09 < 2.2
1983-04-20 07:30
 MST
 T
 WS
 USGS-WRD
 < 0.70 0.23     0.370   0.60 < 0.100     0.030       0.476   0.09 < 3.1
1983-05-24 18:30
 MDT
 T
 WS
 USGS-WRD
 < 1.2 < 1.1     < 0.060   1.1 < 0.100     0.150       < 0.077   0.46 < 5.3
1983-06-14 16:30
 MDT
 T
 WS
 USGS-WRD
 < 0.50 < 0.40     < 0.060   0.40 < 0.100     0.060       < 0.077   0.18 < 2.2
1983-06-28 07:30
 MDT
 T
 WS
 USGS-WRD
 < 1.0 < 0.90     < 0.060   0.90 < 0.100     0.050       < 0.077   0.15 < 4.4
1983-07-27 13:45
 MDT
 T
 WS
 USGS-WRD
 < 1.1 0.96     0.040   1.0 < 0.100     0.040       0.052   0.12 < 4.9
1983-08-22 18:00
 MDT
 T
 WS
 USGS-WRD
 < 0.70 0.46     0.140   0.60 < 0.100     0.010       0.180   0.03 < 3.1
1983-09-20 16:45
 MDT
 T
 WS
 USGS-WRD
 < 0.40 0.28     0.020   0.30 < 0.100     < 0.010       0.026     < 1.8
2004-02-04 08:30
 MST
 K
 WS
 USGS-WRD
   E 0.08   E 0.008   0.002     0.143   0.005   < 0.006 0.23   E 0.010    
2004-03-08 14:30
 MST
 K
 WS
 USGS-WRD
   < 0.13   < 0.010   E 0.001     E 0.008   0.009   < 0.006 0.14   < 0.013    
2004-04-14 16:15
 MDT
 K
 WS
 USGS-WRD
   < 0.23   < 0.010   < 0.002     < 0.016   0.023   < 0.006 0.23   < 0.013    
2004-04-27 10:30
 MDT
 K
 WS
 USGS-WRD
   < 0.24   < 0.010   < 0.002     < 0.016   0.027   < 0.006 0.24   < 0.013    
2004-05-13 18:30
 MDT
 K
 WS
 USGS-WRD
   < 0.26   E 0.005   E 0.001     < 0.016   0.047   0.015 0.27   E 0.006    
2004-05-26 08:30
 MDT
 K
 WS
 USGS-WRD
   < 0.17   < 0.010   < 0.002     E 0.009   0.041   E 0.003 0.18   < 0.013    
2004-06-10 08:15
 MDT
 K
 WS
 USGS-WRD
   < 0.16   E 0.005   E 0.001     < 0.016   0.027   E 0.005 0.16   E 0.006    
2004-06-22 08:30
 MDT
 K
 WS
 USGS-WRD
   < 0.24   < 0.010   < 0.002     < 0.016   0.033   E 0.005 0.24   < 0.013    
2004-07-27 08:00
 MDT
 K
 WS
 USGS-WRD
   < 0.26   < 0.010   < 0.002     < 0.016   0.017   < 0.006 0.26   < 0.013    
2004-08-24 09:50
 MDT
 K
 WS
 USGS-WRD
   < 0.29   < 0.010   < 0.002     < 0.016   0.019   < 0.006 0.29   < 0.013    
2004-10-13 17:00
 MDT
 K
 WS
 USGS-WRD
   < 0.10   < 0.010   < 0.002     < 0.016   0.008   < 0.006 0.10   < 0.013    
2004-12-02 16:30
 MST
 K
 WS
 USGS-WRD
   < 0.08   < 0.010   0.002     0.026   0.005   < 0.006 0.11   < 0.013    
2005-02-09 13:45
 MST
 K
 WS
 USGS-WRD
   E 0.10   E 0.007   0.002     0.049   0.008   < 0.006 0.16   E 0.009    
2005-04-06 10:30
 MDT
 K
 WS
 USGS-WRD
   < 0.17   E 0.005   < 0.002     < 0.016   0.014   < 0.006 0.18   E 0.006    
2005-05-12 16:00
 MDT
 K
 WS
 USGS-WRD
   0.95   0.044   0.004     0.222   0.26   0.035 1.21   0.057    
2005-08-04 12:20
 MDT
 K
 WS
 USGS-WRD
   < 0.22   < 0.010   < 0.002     < 0.016   0.026   < 0.006 0.22   < 0.013    
2005-08-25 08:20
 MDT
 K
 WS
 USGS-WRD
   E 0.24   E 0.005   E 0.001     E 0.008   0.032   < 0.006 0.25   E 0.006    
2005-10-19 09:15
 MDT
 K
 WS
 USGS-WRD
   < 0.13   < 0.010   < 0.002     < 0.016   0.009   < 0.006 0.13   < 0.013    
2005-12-06 16:30
 MST
 K
 WS
 USGS-WRD
   0.11   0.013   0.002     0.147   0.006   < 0.006 0.27   0.017    
2006-03-09 09:30
 MST
 K
 WS
 USGS-WRD
   < 0.18   < 0.010   < 0.002     < 0.016   0.011   < 0.006 0.18   < 0.013    
2006-04-04 08:30
 MDT
 K
 WS
 USGS-WRD
   < 0.19   < 0.010   < 0.002     < 0.016   0.017   < 0.006 0.19   < 0.013    
2006-05-15 19:30
 MDT
 K
 WS
 USGS-WRD
   < 0.54   < 0.010   < 0.002     < 0.016   0.079   < 0.006 0.54   < 0.013    
2006-08-07 10:30
 MDT
 K
 WS
 USGS-WRD
   < 0.37   < 0.010   < 0.002     < 0.016   0.030   E 0.005 0.37   < 0.013    
2006-10-02 17:30
 MDT
 K
 WS
 USGS-WRD
   E 0.18   E 0.011   < 0.002     E 0.008   0.014   < 0.006 0.20   E 0.014    
2007-02-16 09:30
 MST
 K
 WS
 USGS
   0.13   0.085   0.003     0.169   0.019   0.009 0.39   0.110    
2007-04-12 08:00
 MDT
 K
 WS
 USGS-WRD
   < 0.78   < 0.02   0.002     0.107   0.154   0.039 0.88   < 0.026    
2007-05-17 08:30
 MDT
 K
 WS
 USGS-WRD
   < 0.36   < 0.02   E 0.001     0.033   0.079   0.009 0.39   < 0.026    
2007-08-07 08:00
 MDT
 K
 WS
 USGS-WRD
   < 0.29   < 0.02   < 0.002     < 0.016   0.044   0.009 0.29   < 0.026    

Water Quality Remark Code Description
< Less than
E Estimated
M Presence verified but not quantified