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Water Quality Samples for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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

USGS 12340500 Clark Fork above Missoula MT

Missoula County, Montana
Hydrologic Unit Code 17010204
Latitude  46°52'36.35", Longitude 113°55'55.63" NAD83
Drainage area 6,021  square miles
Gage datum 3,198.30 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 



Stream
width,
feet
(00004)


Temper-
ature,
water,
deg C
(00010)


Temper-
ature,
air,
deg C
(00020)


Temper-
ature,
air,
deg F
(00021)

Baro-
metric
pres-
sure,
mm Hg
(00025)



Weather
WMO
code
(00041)



Dis-
charge,
ft3/s
(00060)

Instan-
taneous
dis-
charge,
ft3/s
(00061)
Number
of
sam-
pling
points,
count
(00063)



Gage
height,
feet
(00065)		 Specif-
ic
conduc-
tance,
wat unf
uS/cm @
25 degC
(00095)		 Hydro-
gen
ion,
water,
unfltrd
calcd,
mg/L
(00191)
pH,
water,
unfltrd
field,
std
units
(00400)
pH,
water,
unfltrd
lab,
std
units
(00403)

Hard-
ness,
water,
mg/L as
CaCO3
(00900)


Calcium
water,
fltrd,
mg/L
(00915)

Magnes-
ium,
water,
fltrd,
mg/L
(00925)


Arsenic
water,
fltrd,
ug/L
(01000)


Arsenic
water,
unfltrd
ug/L
(01002)


Cadmium
water,
fltrd,
ug/L
(01025)


Cadmium
water,
unfltrd
ug/L
(01027)


Copper,
water,
fltrd,
ug/L
(01040)
Copper,
water,
unfltrd
recover
-able,
ug/L
(01042)
Iron,
water,
unfltrd
recover
-able,
ug/L
(01045)


Iron,
water,
fltrd,
ug/L
(01046)


Lead,
water,
fltrd,
ug/L
(01049)
Lead,
water,
unfltrd
recover
-able,
ug/L
(01051)		 Manga-
nese,
water,
unfltrd
recover
-able,
ug/L
(01055)

Manga-
nese,
water,
fltrd,
ug/L
(01056)


Zinc,
water,
fltrd,
ug/L
(01090)
Zinc,
water,
unfltrd
recover
-able,
ug/L
(01092)

Gage
height
above
datum
meters
(30207)



Dis-
charge,
m3/s
(30208)

Dis-
charge,
instan-
taneous
m3/s
(30209)

Transit
rate,
sampler
minimum
ft/s
(50014)


Transit
rate,
sampler
ft/s
(50015)

Transit
rate,
sampler
maximum
ft/s
(50016)


Site
visit
purpose
code
(50280)		 Turbid-
ity,
IR LED
light,
det ang
90 deg,
FNU
(63680)		 Suspnd.
sedimnt
sieve
diametr
percent
<0.0625
mm
(70331)



Sample
purpose
code
(71999)		 Sample
loc-
ation,
distanc
down
stream,
feet
(72104)		 Sample
loc-
ation,
distanc
up-
stream,
feet
(72105)

Sampler
nozzle
mater-
ial,
code
(72219)

Sampler
nozzle
di-
ameter,
code
(72220)		 Sus-
pended
sedi-
ment
concen-
tration
mg/L
(80154)		 Sus-
pended
sedi-
ment
dis-
charge,
ton/d
(80155)		 Vel-
city
at
point
in
stream,
ft/s
(81904)


Sam-
pling
method,
code
(82398)



Sampler
type,
code
(84164)
Sample
split-
ter
type,
field,
code
(84171)
Bottle
or bag
sampler
mater-
ial,
code
(84182)		 Specif.
conduc-
tance,
wat unf
lab,
uS/cm @
25 degC
(90095)

Sus-
pended
sedimnt
mass,
grams
(91157)
Sus-
pended
sedimnt
mass
<63 um,
grams
(91158)
Sus-
pended
sedimnt
mass
>63 um,
grams
(91159)		 Suspnd
sedimnt
mass
between
63 um &
4 mm,
grams
(91165)

Type
of
repli-
cate,
code
(99105)		 Type
of
sample
related
QA
data,
code
(99111)		 1 mL
4.5 N
H2SO4
preser-
vative
lot
number
(99156)		 2 mL
7.7 N
HNO3
preser-
vative
lot
number
(99159)		 100
uS/cm
KCl
conduct
stand-
ard lot
number
(99161)		 500
uS/cm
KCl
conduct
stand-
ard lot
number
(99163)		 750
uS/cm
KCl
conduct
stand-
ard lot
number
(99164)		 1000
uS/cm
KCl
conduct
stand-
ard lot
number
(99165)


pH 10
Buffer
lot
number
(99171)


pH 4
Buffer
lot
number
(99172)


pH 7
Buffer
lot
number
(99173)		 Lot no.
first,
inor-
ganic
grade
water,
number
(99200)
0.45 um
capsule
filter
NWIS
lot
number
(99206)		 NWIS
lot
number,
disk
filter,
0.45 um
number
(99218)		 Julian
date,
in-
bottle
diges-
tion,
ddd
(99870)
2019-10-10 14:15
 MDT
 K
 WS
 USGS-WRD
 200 5.0 5.0         1930 6 2.90 323 M  8.4 8.3 153 41.4 12.0 3.7 4.7 < 0.030 0.03 2.5 4.6 108 < 10.0 0.026 0.64 23.7 5.21 2.3 8 0.88   55   0.4   1001   92       3 5 4 21 2.40 10 3044 200 2 331 0.0109     0.0009       40295 30715 30656 30724   20356   20350   10062    
2020-03-26 11:05
 MDT
 K
 WS
 USGS-WRD
 283 4.0 6.5         1690 5   310 0.00001 8.2 8.2 146 39.5 11.6 3.3 3.8 0.031 0.05 1.7 4.4 147 12.2 0.039 0.72 27.8 6.37 < 2.0 7     48 0.4   0.4 1001   88       3 5 7 32   20 3044 200 2 325 0.0332     0.0039       40299 30763 30713 30724   20356   20350   10062    
2020-04-15 10:00
 MDT
 K
 WS
 USGS-WRD
 310 4.8 2.0         3090 5   257 0.00001 8.1 8.2 114 31.3 8.78 2.4 3.3 < 0.030 0.06 2.2 7.7 328 39.5 0.067 1.30 51.8 5.55 2.3 11     88 0.2   0.3 1001   87       3 5 19 159   20 3054 200 2 262 0.0833     0.0107   10   40299 30763 30713 30724   20356 20353 20350   10062    
2020-05-07 10:00
 MDT
 K
 WS
 USGS-WRD
 255 7.2 8.5         9250 5   170 0.00001 7.9 8.2 77.0 21.2 5.87 2.0 2.8 < 0.030 0.06 1.6 9.6 507 33.5 0.084 1.59 49.7 3.88 < 2.0 15     262 0.5   0.6 1001   76       3 5 34 849   20 3044 200 2 174 0.1413     0.0346       40311 30763 30811 30724   20419   20350   10062    
2020-05-20 10:00
 MDT
 K
 WS
 USGS-WRD
 290 9.6 12.0         14000 5   148 0.00001 7.8 8.0 67.0 18.2 5.23 2.1 6.2 < 0.030 0.28 2.8 43.0 2050 53.6 0.151 7.38 178 12.4 3.6 76     396 0.6   0.9 1001   56       3 3 191 7220   20 3054 200 2 155 0.8224     0.3585       40311 30763 30811 30831   20419   20350   10063   20201000
2020-06-03 09:55
 MDT
 K
 WS
 USGS-WRD
 288 12.1 20.0         13000 5   165 0.00001 8.0 8.1 81.0 22.4 6.08 3.1 4.4 < 0.030 0.09 2.8 15.5 794 29.7 0.093 2.36 58.6 6.89 2.5 23     368 0.9   2.0 1001   72       3 5 50 1760   20 3054 200 2 167 0.2166     0.0597 30.00 30   40311 30763 30811 30831   20419 20353 20350   10063   20201000
2020-07-15 09:40
 MDT
 K
 WS
 USGS-WRD
 207 14.4 19.0         4720 5   249 0.00001 8.1 8.3 115 31.7 8.80 4.2 4.9 0.031 0.05 2.9 7.2 176 < 10.0 0.052 0.78 24.2 9.83 2.4 9     134 0.3   0.6 1001   77       3 5 8 102   20 3044 200 2 250 0.0332     0.0075       40311 30763 30811 30831   20419   20350   10063   20201000
2020-08-19 09:55
 MDT
 K
 WS
 USGS-WRD
 245 17.1 20.0         1570 16   298 0.00001 8.1 8.2 144 38.2 11.9 3.9 4.4 < 0.030 0.03 2.0 3.6 71.1 < 10.0 0.021 0.32 22.6 7.85 < 2.0 6     44   0.2   1001   82       3 5 4 17   10 3044 200 2 301 0.0180     0.0032       40311 30763 30811 30831   20419   20350   10063   20201000
2020-10-15 09:45
 MDT
 K
 WS
 USGS-WRD
 285 6.9 6.0           8   328 0.00001 7.9 8.2 141 38.2 11.0 3.3 4.1 < 0.030 0.06 1.6 7.3 221 7.3 0.039 1.19 43.8 7.76 2.4 14         0.4   1001   85       3 5 12     10 3045 200 2 314 0.0413     0.0060       40322 30763 30811 30831   20419   20398   10063   20201000
2021-03-24 10:15
 MDT
 K
 WS
 USGS-WRD
 267 4.0 6.5           4   304 0.00001 8.0 8.2 149 40.4 11.7 5.0 5.1 0.067 0.09 9.8 10.4 447 408 1.67 1.81 53.0 59.2 17.3 18       0.3   0.5 1001   88       3 5 21     20 3052 200 2 307 0.0640     0.0074       40327 30862 30870 30861   20451   20398   10063   20210000
2021-04-14 09:50
 MDT
 K
 WS
 USGS-WRD
 268 3.9 3.5           4   241 0.00001 8.1 8.2 107 29.4 8.11 2.0 2.6 < 0.030 0.04 1.5 5.0 232 26.5 0.051 0.87 27.8 7.99 2.3 8       0.4   0.5 1001   81       3 5 11     20 3054 200 2 245 0.0353     0.0066   10   40327 30862 30870 30861   20480 20404 20422   10063   20211000
2021-05-06 10:30
 MDT
 K
 WS
 USGS-WRD
 271 9.1 17.5           4   179 0.00001 8.1 8.2 80.0 22.2 6.00 1.8 2.6 < 0.030 0.06 1.6 7.4 482 29.5 0.061 1.38 48.2 4.79 < 2.0 13       0.6   0.9 1001   73       3 5 31     20 3044 200 2 181 0.1161     0.0315       40332 30914 30870 30922   20480   20529   10067   20211000
2021-05-19 10:00
 MDT
 K
 WS
 USGS-WRD
 277 9.1 11.0           4   149 0.00002 7.8 8.2 69.1 18.8 5.37 1.6 2.4 < 0.030 0.06 1.5 8.1 596 29.0 0.056 1.47 53.0 4.15 < 2.0 12       0.7   0.9 1001   70       3 5 50     20 3054 200 2 153 0.1852     0.0548       40332 30862 30870 30922   20480   20529   10067   20211000
2021-06-09 10:00
 MDT
 K
 WS
 USGS-WRD
 275 12.5 20.0           4   175 0.00001 8.1 8.2 77.5 21.0 6.07 2.1 2.9 < 0.030 0.05 1.9 8.5 417 18.1 0.052 1.34 37.1 4.96 < 2.0 12       0.5   0.9 1001   83       3 4 29     20 3054 200 2 177 0.0931     0.0162 30.00 30   40332 30914 30870 30922   20480 20468 20529   10067   20211000
2021-07-14 09:45
 MDT
 K
 WS
 USGS-WRD
 263 17.3 21.5           4   260 0.00001 8.2 8.3 133 34.4 11.3 2.9 2.9 < 0.030 < 0.03 1.5 2.2 46.9 8.4 0.029 0.15 10.7 4.27 < 2.0 2         0.3   1001   85       3 5 2     10 3044 200 2 260 0.0084     0.0013       40332 30914 30870 30922   20480   20529       20211000
2021-08-18 09:45
 MDT
 K
 WS
 USGS-WRD
 232 14.8 13.0     2     12   297 0.00001 8.1 8.3 152 39.7 12.9 3.2 3.6 < 0.030 < 0.03 1.4 2.8 98.1 8.4 0.024 0.30 22.2 6.98 < 2.0 6         0.4   1001     10.00 200.0   3 5       10 3044 200 2 300             40336 40332 30926 30870 30922 30857 20480 20468 20529 81818 10071   20211000
2021-10-14 08:15
 MST
 K
 WS
 USGS-WRD
 242 5.4 3.0     2 1380   12 2.62 326 0.00001 8.2 8.3 167 44.7 13.4 3.4 3.9 < 0.030 0.04 1.2 4.1 112 7.1 0.033 0.62 25.0 4.41 < 2.0 7 0.80 39     0.6   1001   91 10.00 300.0   3 5 5     10 3044 200 2 343 0.0191     0.0018       40339 30926 30840 30939   20480       10071   20211000
2022-03-24 08:00
 MDT
 K
 WS
 USGS-WRD
 255 8.6 4.0     1 2300   10 3.15 288 0.00001 8.1 8.1 143 38.2 11.6 2.6 3.0 < 0.030 0.05 1.7 5.8 13.9 13.8 0.039 0.88 29.5 7.90 2.4 10 0.96 65     0.5   1001   86 10.00 450.0   3 5 12     10 3044 200 2 293 0.0419     0.0059   1   40354 30938 30940   30878 20564   20489   10071   20220000
2022-04-20 08:45
 MDT
 K
 WS
 USGS-WRD
 259 5.6 3.5     2 2400   4 3.21 254 0.00001 8.1 8.2 132 35.2 10.6 2.3 2.6 < 0.030 < 0.03 1.3 3.2 117 11.8 0.036 0.43 16.9 6.14 < 2.0 5 0.98 68   0.2   0.5 1001   89 10.00   10.0 3 5 3     20 3052 200 2 265 0.0093     0.0010   10   40354 30938 30940   30878 20564 20468 20489 81822 10071   20221000
2022-05-05 07:45
 MDT
 K
 WS
 USGS-WRD
 258 10.0 9.5     1 4280   5 4.22 194 0.00001 8.0 8.1 87.3 23.7 6.80 1.7 2.9 < 0.030 0.06 1.5 7.6 805 23.1 0.045 1.87 71.2 5.10 < 2.0 14 1.29 121   0.3   0.8 1001   89 10.00   15.0 3 5 53     20 3052 200 2 198 0.1877     0.0198       40354 30938 30940   30929 20564   20489   10075   20221000
2022-05-26 08:15
 MDT
 K
 WS
 USGS-WRD
 240 10.7 13.0     1 5390   5 4.72 178 0.00001 8.1 8.2 83.4 22.5 6.60 1.5 1.7 < 0.030 < 0.03 1.2 2.6 186 13.9 0.029 0.43 18.8 3.76 < 2.0 4 1.44 153   0.6   1.0 1001   82 10.00   10.0 3 5 11     20 3044 200 2 179 0.0388     0.0071       40357 30978 30940   30929 20564   20489   10075   20221000
2022-06-09 07:30
 MDT
 K
 WS
 USGS-WRD
 270 11.2 12.5     1 9170   5 6.47 166 0.00001 7.9 8.2 79.0 21.8 5.96 2.2 3.7 < 0.030 0.09 1.8 13.3 593 22.1 0.095 2.22 58.1 3.96 < 2.0 19 1.97 260   0.8   1.4 1001   74 10.00   20.0 3 5 42     20 3044 200 2 170 0.1360     0.0355 30.00 30   40357 30978 30940   30929 20564   20489   10075   20221000
2022-07-14 08:50
 MDT
 K
 WS
 USGS-WRD
 250 16.9 18.0       3590   5 3.93 246 0.00001 8.0 8.2 121 33.5 9.15 3.2 3.2 < 0.030 < 0.03 1.6 3.6 157 10.8 0.040 0.51 17.3 4.42 < 2.0 5 1.20 102   0.4   0.5 1001   89 10.00   10.0 3 5 8     10 3044 200 2 245 0.0275     0.0030       40357 30978 30940   30929 20582   20489     10074 20221000
2022-08-18 08:45
 MDT
 K
 WS
 USGS-WRD
 250 17.7         1150   5 2.43 281 0.00001 8.1 8.3 138 35.5 12.1 2.8 2.9 < 0.030 < 0.03 1.2 2.8 82.8 7.0 0.026 0.31 21.5 4.79 < 2.0 5 0.74 33         1001   87 10.00   10.0 3 5 4     40 3054 10 2 274 0.0179     0.0024   1   40368                 10074   20221000
2022-10-06 11:45
 MDT
 K
 WS
 USGS-WRD
   11.3 18.0       1540     2.68 340 M  8.3 8.3 165 43.8 13.4 4.0 4.2 < 0.030 0.04 1.6 4.3 106 7.1 0.035 0.57 24.7 4.46 < 2.0 8 0.82 44         1001   86 10.00   20.0 3 5 6     20 3044 10 2 333 0.0222 0.0190 0.0032     1   40368                 10074   20221000
2023-03-23 08:30
 MDT
 K
 WS
 USGS-WRD
 260 2.2       0.0 1260     2.51 334 0.00007 7.2 8.0 148 40.4 11.5 3.6 4.5 < 0.030 0.06 3.0 9.7 175 7.6 0.031 1.11 38.2 10.2 3.2 13 0.77 36         1001 3.8 65 10.00   100.0 3 5 7     20 3054   2 334 0.0255 0.0167 0.0088     1                         20230000
2023-04-12 16:15
 MDT
 K
 WS
 USGS-WRD
 280 6.2   46.0 672 2 5320     4.75 223 0.00001 8.1 8.0 97.7 27.1 7.31 5.7 12.4 < 0.030 0.38 5.7 58.5 2860 115 0.339 12.2 320 13.7 4.5 90 1.45 151         1001 66   10.00   5.0 3 5       20 3052 200 2 240           1   40368                 10079   20230000
2023-05-11 08:30
 MDT
 K
 WS
 USGS-WRD
 170 9.2     680 1 12300     7.60 170 0.00001 7.9                                     2.32 348         1001 22   10.00   50.0 3 4       20 3054   2             1   40382                 10079    

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