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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.


! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 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)

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,
instan-
taneous
m3/s
(30209)

Transit
rate,
sampler
minimum
ft/s
(50014)

Transit
rate,
sampler
maximum
ft/s
(50016)


Site
visit
purpose
code
(50280)		 Suspnd.
sedimnt
sieve
diametr
percent
<0.0625
mm
(70331)



Sample
purpose
code
(71999)

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)		 Type
of
sample
related
QA
data,
code
(99111)		 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)


pH 10
Buffer
lot
number
(99171)


pH 4
Buffer
lot
number
(99172)


pH 7
Buffer
lot
number
(99173)
0.45 um
capsule
filter
NWIS
lot
number
(99206)
2017-10-25 13:15
 MDT
 K
 WS
 USGS-WRD
 138 6.0 9.0 1520 4 2.77 319 M  8.4 8.3 154 41.5 12.3 3.7 4.4 < 0.030 0.04 1.7 3.2 69.3 < 10.0 0.033 0.31 15.5 4.36 2.0 6 0.84 43 0.9 1.2 1001 86   3 5 4 16   20 3054 200 2 319   40241 30512 30522   20269   20264 10044
2018-03-28 14:30
 MDT
 K
 WS
 USGS-WRD
 280 5.0   3230 4 3.70 301 M  8.4 8.1 139 38.2 10.6 3.9 5.6 < 0.030 0.08 3.2 13.0 503 49.6 0.090 1.66 52.0 8.44 < 2.0 16 1.13 91 0.8 1.6 1001 88   3 5 24 209 3.10 20 3044 200 2 305   40246 30505 30551   20270   20264  
2018-04-18 15:15
 MDT
 K
 WS
 USGS-WRD
 282 6.0 15.0 6530 4 5.27 237 0.00001 8.3 8.1 108 29.1 8.67 2.7 4.4 < 0.030 0.09 2.7 11.7 811 89.6 0.126 1.93 71.9 8.30 2.2 19 1.61 185 0.5 0.8 1001 78   3 5 41 723 4.90 20 3054 200 2 244 10 40246 30569 30551 30541 20291   20276 10044
2018-05-09 14:10
 MDT
 K
 WS
 USGS-WRD
 290 10.0 22.0 27800 5 12.45 158 0.00001 7.9 8.0 73.3 20.3 5.50 4.1 9.0 < 0.030 0.28 5.1 47.4 3190 72.8 0.225 8.20 201 14.6 3.6 73 3.79 787 1.0 1.6 1001 65   3 3 257 19300 8.00 20 3054 200 2 168   40246 30569 30551   20291   20280 10044
2018-05-23 16:10
 MDT
 K
 WS
 USGS-WRD
 290 11.5 21.0 21900 5 10.80 159 0.00001 8.0 8.0 75.0 20.6 5.70 4.1 6.1 < 0.030 0.12 4.6 19.4 1180 53.1 0.151 3.42 87.7 14.3 3.6 31 3.29 620 0.8 1.2 1001 71   3 3 98 5790 7.50 20 3054 10 2 164   40254 30569 30551   20291   20280 10044
2018-06-07 08:15
 MDT
 K
 WS
 USGS-WRD
 281 12.5 11.5 13900 5 8.18 184 0.00001 8.0 8.1 85.5 23.8 6.34 7.2 7.5 0.121 0.14 20.4 20.9 903 31.6 2.99 3.09 78.0 85.0 27.7 30 2.49 394 0.6 1.0 1001 71   3 3 66 2480 7.06 20 3054 10 2 185 30 40254 30576 30600   20291   20280 10044
2018-07-18 16:00
 MDT
 K
 WS
 USGS-WRD
 254 18.0 34.0 3800 5 4.01 261 M  8.4 8.2 132 35.2 10.6 5.1 5.7 < 0.030 0.05 2.6 6.7 143 10.2 0.050 0.67 26.8 10.3 < 2.0 7 1.22 108 0.3 0.6 1001 73   3 5 7 72 2.93 20 3054 10 2 263   40254 30576 30645 30635 20315   20280 10052
2018-08-15 16:10
 MDT
 K
 WS
 USGS-WRD
 261 17.0 34.0 1790 5 2.83 300 M  8.5 8.4 143 37.9 11.8 4.3 4.5 < 0.030 < 0.03 1.9 2.7 40.1 < 10.0 0.020 0.15 13.3 6.23 < 2.0 3 0.86 51 0.1 0.3 1001 81 40.00 3 5 2 9.7 2.30 10 3044 10 2 295   40254 30511 30645 30635 20315 20273 20280 10055

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