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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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



Weather
WMO
code
(00041)

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
ft/s
(50015)

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)

Sus-
pended
sedimnt
mass,
grams
(91157)		 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)


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)
2018-10-17 16:15
 MDT
 K
 WS
 USGS-WRD
 177 7.0 16.0   1930 5 2.90 329 M  8.5 8.4 159 43.0 12.6 4.4 4.7 < 0.030 0.04 1.9 5.0 77.0 < 10.0 0.023 0.46 21.0 5.65 < 2.0 7 0.88 55 0.2   0.3 1001 86 40.00 3 5 3 16 2.35 20 3054 10 2 336 0.0116 0.0016       40267 30576 30645 30635 20291   20280   10055
2019-03-27 15:15
 MDT
 K
 WS
 USGS-WRD
 265 3.0 4.0 50 3250 5 3.71 273 0.00001 8.1 8.2 124 34.8 8.95 6.6 18.7 0.048 0.59 11.8 120 3200 69.2 0.254 16.4 320 13.7 8.4 140 1.13 92       1001 86 40.00 3 5 131 1150 3.50 20 3054 200 2 288 0.3472 0.0482     40280 40282 30614 30656   20356   20350   10055
2019-04-24 17:00
 MDT
 K
 WS
 USGS-WRD
 275 9.0 16.0   11900 5 7.47 179 0.00001 8.0 8.2 78.7 21.4 6.15 2.9 5.6 0.036 0.13 3.3 18.6 1220 58.2 0.138 3.48 87.8 9.35 3.0 33 2.28 337 0.7   1.2 1001 62 40.00 3 4 72 2320 7.70 20 3054 200 2 184 0.2674 0.1029   10   40282 30614 30656 30635 20356 20316 20350   10055
2019-05-08 16:15
 MDT
 K
 WS
 USGS-WRD
 320 11.0 15.0   7860 5 5.88 193 0.00001 8.3 8.3 91.7 25.3 6.95 2.8 4.3 < 0.030 0.07 2.5 10.8 471 31.6 0.071 1.68 43.0 6.70 2.1 18 1.79 222 0.8   1.4 1001 64 40.00 3 5 28 594 5.20 40 3054 200 2 197 0.1145 0.0408     40280 40282 30614   30635 20356   20350 81805 10055
2019-05-22 16:30
 MDT
 K
 WS
 USGS-WRD
 265 10.0 16.0   10500 5 7.02 180 0.00001 8.1 8.1 80.8 22.4 6.01 3.4 5.6 < 0.030 0.11 3.5 17.9 728 34.9 0.118 2.78 58.1 9.08 3.4 28 2.14 297 0.6   0.8 1001 69 40.00 3 3 48 1360 6.00 20 3054 200 2 184 0.1698 0.0527       40282 30614 30656 30635 20356 20316 20350   10055
2019-06-05 16:15
 MDT
 K
 WS
 USGS-WRD
 277 14.5 24.0   10800 5 7.07 176 0.00001 8.2 8.2 82.8 22.9 6.22 3.5 5.1 < 0.030 0.08 3.3 13.2 536 21.8 0.072 1.85 45.7 8.08 2.3 19 2.15 307 0.8   1.0 1001 72 40.00 3 4 35 1020 7.00 40 3052 200 2 177 0.1495 0.0425 30.00 30   40282 30715 30656 30635 20356 20316 20350   10057
2019-07-17 16:00
 MDT
 K
 WS
 USGS-WRD
 255 17.0 25.0   2830 5 3.47 281 M  8.5 8.4 133 35.6 10.7 5.2 5.5 < 0.030 < 0.03 2.3 4.1 121 < 10.0 0.038 0.43 22.5 5.49 < 2.0 5 1.06 80 0.2   0.5 1001 89   3 5 5 38 3.10 20 3054 200 2 283 0.0188 0.0020       40282 30715 30656 30724 20356 20316 20350   10057
2019-08-21 13:45
 MDT
 K
 WS
 USGS-WRD
 300 20.0 33.0   1350 10 2.50 309 M  8.6 8.4 144 38.5 11.5 4.6 4.9 < 0.030 0.03 1.8 3.6 53.4 < 10.0 0.024 0.25 17.0 5.67 < 2.0 4 0.76 38   0.4   1001 97   3 5 2 7.3 2.10 10 3044 200 2 312 0.0032 0.0001       40295 30715 30656 30724 20356 20316 20350   10062

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