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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 12323700 Mill Creek at Opportunity, MT

Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°06'51.76", Longitude 112°49'11.19" NAD83
Drainage area 42.5  square miles
Gage datum 04,940 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 



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)
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)

Carbon
dioxide
water,
unfltrd
mg/L
(00405)		 Carbon-
ate,
wat flt
infl pt
titr.,
field,
mg/L
(00452)		 Bicar-
bonate,
wat flt
infl pt
titr.,
field,
mg/L
(00453)

Organic
carbon,
water,
fltrd,
mg/L
(00681)

Hard-
ness,
water,
mg/L as
CaCO3
(00900)		 Noncarb
hard-
ness,
wat flt
field,
mg/L as
CaCO3
(00904)		 Noncarb
hard-
ness,
wat flt
lab,
mg/L as
CaCO3
(00905)


Calcium
water,
fltrd,
mg/L
(00915)

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


Sodium,
water,
fltrd,
mg/L
(00930)


Sodium
adsorp-
tion
ratio
(00931)
Sodium
frac-
tion
of
cations
percent
(00932)

Potas-
sium,
water,
fltrd,
mg/L
(00935)

Chlor-
ide,
water,
fltrd,
mg/L
(00940)


Sulfate
water,
fltrd,
mg/L
(00945)

Fluor-
ide,
water,
fltrd,
mg/L
(00950)

Silica,
water,
fltrd,
mg/L as
SiO2
(00955)


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)		 Alka-
linity,
wat flt
fxd end
lab,
mg/L as
CaCO3
(29801)

Gage
height
above
datum
meters
(30207)



Dis-
charge,
m3/s
(30208)		 Alka-
linity,
wat flt
inf tit
field,
mg/L as
CaCO3
(39086)


Transit
rate,
sampler
ft/s
(50015)


Site
visit
purpose
code
(50280)		 Turbdty
white
light,
det ang
90+/-30
corrctd
NTRU
(63676)		 Turbid-
ity,
IR LED
light,
det ang
90 deg,
FNU
(63680)		 Dis-
solved
solids,
sum of
consti-
tuents,
mg/L
(70301)
Dis-
solved
solids,
water,
tons/
acre-ft
(70303)		 Suspnd.
sedimnt
sieve
diametr
percent
<0.0625
mm
(70331)		 Hydrox-
ide,
wat flt
infl pt
titr.,
field,
mg/L
(71834)



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)		 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)
0.16 N
Sulfur-
ic acid
titrant
lot
number
(99174)		 1800
uS/cm
KCl
conduct
stand-
ard lot
number
(99177)		 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)
2019-10-07 16:15
 MDT
 K
 WS
 USGS-WRD
 8.00 9.0 18.0       12 1 2.29 204 0.00002 7.7 8.1 3.2     1.79 88.2   8 24.7 6.45 6.10 0.28 13 0.87 2.83 21.4 0.36 12.7 21.6 22.2 0.054 0.08 1.5 2.2 146 67.7 0.075 0.30 9.9 5.51 2.7 4 79.9 0.70 0.35     1001 < 2.0   123 0.17 42   10.00     3 5 1 1.10 70 3070 10 2 209 0.0024     0.0014     40286 40295 30715 30656 30724   20356 20316 20350       10062    
2020-03-24 15:20
 MDT
 K
 WS
 USGS-WRD
 12.0 3.4 7.0       9.3 24 2.22 238 0.00001 8.0 8.1 1.7     1.08 103   7 28.6 7.72 7.22 0.31 13 0.94 0.85 27.8 0.35 12.9 14.5 16.8 0.044 0.05 1.0 1.9 53.9 17.9 0.032 0.10 4.1 2.91 < 2.0 2 96.0 0.68 0.26   0.2 1001 < 2.0   144 0.20 89   10.00     3 5 < 0.5   10 3044 10 2 240 0.0009     0.0001     40286 40299 30715 30713 30724   20356   20350       10062    
2020-04-13 15:20
 MDT
 K
 WS
 USGS-WRD
 10.0 2.1 2.0       16 20 2.35 207 0.00001 7.8 8.1 2.3     1.65 92.3   11 25.4 7.02 6.94 0.31 14 0.89 1.00 24.7 0.37 13.9 15.0 16.9 0.041 0.08 2.6 2.5 134 32.1 0.058 0.43 11.7 4.67 < 2.0 3 81.4 0.72 0.46   0.1 1001 < 2.0   129 0.18 77   10.00     3 5 3   10 3044 10 2 209 0.0079     0.0018     40308 40299 30763 30713 30724   20356   20350       10062    
2020-05-06 08:50
 MDT
 K
 WS
 USGS-WRD
 21.0 5.5 14.5       47 21 2.60 119 0.00003 7.5 8.1 2.8     2.65 45.4     12.9 3.22 4.68 0.30 18 0.65 0.44 9.51 0.28 14.1 19.2 21.8 0.040 0.09 3.1 5.7 264 53.9 0.154 0.99 15.0 3.83 2.3 5 50.6 0.79 1.3   0.3 1001 E 3.8   76 0.10 73   10.00     3 5 6   10 3044 200 2 120 0.0099     0.0027     40308 40311 30763 30811 30724   20419 20353 20350       10062    
2020-05-18 14:20
 MDT
 K
 WS
 USGS-WRD
 18.0 10.7 19.0       47 16 2.62 114 0.00002 7.8 8.0 1.5     2.64 49.2     14.0 3.45 4.57 0.28 17 0.63 0.39 8.43 0.29 14.3 19.8 22.1 0.042 0.11 3.1 6.5 317 38.2 0.111 1.25 22.5 4.96 < 2.0 6 49.4 0.80 1.3   0.3 1001 E 4.2   76 0.10 74   10.00     3 5 10   10 3044 10 2 115 0.0278     0.0073     40308 40311 30763 30811 30724   20419   20350       10063   20201000
2020-06-01 13:10
 MDT
 K
 WS
 USGS-WRD
 18.0 9.5 18.0       135 16 3.26 65 0.00002 7.6 7.8 1.4     3.04 27.6     8.07 1.80 2.25 0.19 15 0.57 0.23 3.94 0.29 9.75 12.1 16.1 0.045 0.33 3.3 12.4 784 38.4 0.138 3.15 45.4 5.00 < 2.0 13 29.1 0.99 3.8   0.4 1001 E 9.2   44 0.06 49   10.00     3 5 41   10 3044 10 2 E 66 0.1157     0.0595     40308 40311 30763 30811 30831   20419   20350       10063   20201000
2020-07-13 14:45
 MDT
 K
 WS
 USGS-WRD
 17.0 12.5 24.0       55 8 2.69 113 0.00001 7.9 8.1 1.2     1.79 47.1     13.7 3.17 4.10 0.26 16 0.50 0.39 7.61 0.29 11.7 23.0 26.6 0.035 0.10 2.4 5.0 233 41.2 0.117 0.79 17.5 6.69 < 2.0 7 49.9 0.82 1.6   0.1 1001 < 2.0   71 0.10 56   10.00     3 5 5   10 3044 10 2 113 0.0124     0.0054     40312 40311 30763 30811 30831   20419   20350       10063   20201000
2020-08-17 14:55
 MDT
 K
 WS
 USGS-WRD
 11.0 17.3 34.0       7.3 9 2.11 184 0.00001 8.2 8.2 0.9     1.46 83.5   7 23.7 5.91 5.75 0.27 13 0.93 0.48 14.8 0.33 13.2 31.7 31.3 0.041 0.05 1.9 2.5 137 78.1 0.109 0.27 9.6 6.91 < 2.0 3 76.5 0.64 0.21   0.1 1001 < 2.0   111 0.15 77   10.00     3 5 1   10 3044 10 2 182 0.0013     0.0003 30.00 30 40312 40311 30763 30811   30857 20419   20350       10063   20201000
2020-10-13 15:25
 MDT
 K
 WS
 USGS-WRD
 13.0 6.9 11.0       14 26 2.21 240 0.00001 7.9 8.1 2.1     2.10 97.2   7 27.1 7.16 6.57 0.29 13 0.92 0.92 21.5 0.36 13.4 27.6 26.4 0.066 0.09 1.9 2.7 148 77.5 0.095 0.27 9.8 8.41 2.8 4 90.1 0.67 0.41   0.1 1001 < 2.0   132 0.18 93   10.00     3 5 1   10 3045 10 2 217 0.0015     0.0001     40312 40311 30763 30811   30857 20419 20379 20398       10063   20201000
2021-03-22 15:40
 MDT
 K
 WS
 USGS-WRD
 13.0 3.4 7.0       10 26 2.17 233 0.00001 8.2 8.2 1.2     1.25 106   14 29.5 7.89 7.45 0.31 13 0.93 1.02 27.7 0.37 13.8 17.2 17.9 0.046 0.06 1.3 2.7 306 34.2 0.049 0.47 8.1 3.20 < 2.0 3 92.0 0.66 0.29   0.1 1001 E 3.8   144 0.20 97   10.00     3 5 7   10 3044 10 2 232 0.0118     0.0003     40325 40327 30862 30870   30857 20451   20398       10063   20210000
2021-04-12 14:50
 MDT
 K
 WS
 USGS-WRD
 13.0 2.9 5.0       14 22 2.24 198 0.00001 8.1 8.3 1.3     1.65 88.8   8 24.6 6.67 6.72 0.31 14 0.82 0.72 21.0 0.35 14.4 18.7 18.9 0.056 0.05 1.8 2.4 93.1 36.3 0.054 0.23 5.9 3.73 < 2.0 2 80.8 0.68 0.40   0.1 1001 < 2.0   124 0.17 82   10.00     3 5 1   10 3044 10 2 199 0.0034     0.0006     40325 40327 30862 30870   30857 20480   20422       10063   20211000
2021-05-04 15:15
 MDT
 K
 WS
 USGS-WRD
 16.0 9.4 16.5       26 32 2.41 137 0.00001 8.0 8.1 1.1     2.71 56.7     16.2 3.94 5.09 0.29 16 0.83 0.59 12.2 0.33 13.6 19.5 19.9 0.046 0.08 3.3 5.4 218 51.5 0.145 0.72 13.3 4.32 2.0 4 57.5 0.73 0.74   0.1 1001 E 2.6   87 0.12 72   10.00     3 5 5   10 3044 10 2 138 0.0069     0.0019     40325 40327 30862 30870   30857 20480   20422       10067   20211000
2021-05-17 15:00
 MDT
 K
 WS
 USGS-WRD
 14.0 14.6 29.0       21 14 2.35 116 0.00001 7.9 8.0 1.2     2.75 49.9     14.4 3.38 4.30 0.26 16 0.80 0.38 8.64 0.31 13.6 20.4 20.5 0.046 0.09 2.9 5.0 197 39.2 0.114 0.77 15.9 5.89 < 2.0 4 50.6 0.72 0.61   0.2 1001 E 2.3   76 0.10 91   10.00     3 5 4   10 3044 10 2 118 0.0088     0.0008     40325 40332 30862 30870   30857 20480   20422       10067   20211000
2021-06-07 12:45
 MDT
 K
 WS
 USGS-WRD
 17.0 8.4 20.0       65 17 2.76 80 0.00002 7.8 7.9 1.2     2.55 34.2     10.0 2.23 2.65 0.20 14 0.61 0.52 5.31 0.30 10.5 12.3 16.1 0.034 0.11 2.6 5.5 247 30.9 0.114 1.18 14.5 4.59 2.1 5 35.0 0.84 1.8   0.2 1001 E 2.4   53 0.07 67   10.00     3 5 9   10 3044 10 2 E 80 0.0153     0.0050     40325 40332 30914 30870   30857 20480   20529       10067   20211000
2021-07-12 15:00
 MDT
 K
 WS
 USGS-WRD
 12.0 18.5 31.0       2.2 24 1.90 152 0.00001 8.0 8.1 1.4     1.64 62.8     18.3 4.15 3.94 0.22 12 0.57 0.47 10.4 0.37 11.6 27.7 27.9 0.051 0.06 2.0 3.1 152 77.7 0.138 0.40 13.5 8.94 < 2.0 3 67.3 0.58 0.06     1001 < 2.0   90 0.12 87   10.00     3 5 2   70 3044 10 2 151 0.0031     0.0004     40336 40332 30914   30922 30857 20480   20529       10067   20211000
2021-08-16 14:45
 MDT
 K
 WS
 USGS-WRD
 4.00 17.0 28.5     1 0.78   1.73 201 0.00001 8.0 8.2 1.9       93.7   5 26.5 6.68 6.07 0.27 12 1.10 0.79 14.8 0.39 12.9 27.6 28.3 < 0.030 0.04 1.8 3.4 115 67.2 0.082 0.16 10.3 8.30 < 2.0 < 2 88.6 0.53 0.02     1001     123 0.17     10.00   0.0 3 5     70 3044 10 2 200         30.00 30 40336 40332 30926 30870 30922 30857 20480 20468 20529     81818 10067   20211000
2021-10-12 15:45
 MST
 K
 WS
 USGS-WRD
 11.0 5.0 1.0     2 1.3 17 1.82 211 0.00001 7.9 8.1 2.4     1.59 96.7   8 27.0 7.12 6.45 0.29 13 1.08 0.88 20.9 0.35 14.7 11.4 11.8 0.041 0.05 1.4 1.4 103 79.7 0.048 0.07 16.0 15.8 2.3 2 89.0 0.55 0.04   0.1 1001 < 2.0   132 0.18 86   10.00     3 5 < 0.5   10 3044 10 2 216 0.0007     0.0001     40336 40339 30926   30922 30857 20480 20468 20529       10067   20211000
2022-03-22 18:15
 MDT
 K
 WS
 USGS-WRD
 11.5 6.7 10.0     1 1.6 10 1.86 226 0.00001 7.9 8.2 2.4     1.09 101   15 28.2 7.46 6.60 0.29 12 0.83 0.78 26.8 0.35 13.1 11.3 12.5 0.038 0.05 1.3 1.7 75.0 32.7 0.035 0.09 7.8 6.53 2.4 3 86.5 0.57 0.04     1001 < 2.0   136 0.18 83   10.00 2.0   3   < 0.5   70 3044 30 2 230 0.0006     0.0001   1 40340 40339 30938   30939   20564   20489   31010   10072   20220000
2022-04-18 16:00
 MDT
 K
 WS
 USGS-WRD
 10.0 6.8 14.5     1 1.4 10 1.83 203 0.00001 7.9         1.45                                                         0.56 0.04     1001 < 2.0       45   10.00 5.0   3   1   70 3044 30 2   0.0011     0.0006   1 40340 40354 30938   30939   20564   20489   31010   10072    
2022-05-03 17:00
 MDT
 K
 WS
 USGS-WRD
   12.5 14.0     2 1.6 14 1.84 207 0.00001 7.9         1.84                                                         0.56 0.04     1001 < 2.0       88   10.00 3.0   3 5 < 0.5   70 3044 30 2   0.0008     0.0001   1 40360 40354 30938   30939   20564   20489   31010   10075    
2022-05-24 16:15
 MDT
 K
 WS
 USGS-WRD
 10.0 13.4 19.0     1 1.6 6 1.81 157 0.00002 7.8         2.36                                                         0.55 0.04     1001 < 2.0       91   10.00 5.0   3 5 1   10 3044 30 2   0.0023     0.0002     40360 40354 30938   30939   20564   20489   31010   10075    
2022-06-07 15:30
 MDT
 K
 WS
 USGS-WRD
 22.0 10.9 18.0     1 116 12 2.97 76 0.00002 7.7         3.42                                                         0.91 3.3   0.3 1001 E 3.6       64   10.00 220.0   3 5 13   10 3044 30 2   0.0393     0.0140     40360 40357 30978   30939   20564   20489   31010   10075    
2022-07-12 17:40
 MDT
 K
 WS
 USGS-WRD
 35.0 20.0 33.0     1 31   2.51 106 0.00002 7.7         1.71                                                         0.77 0.89     1001 < 2.0       91   10.00     3 5 7   10 3044 30 2   0.0099     0.0009     40363 40357 30978   30939   20582   20489   31010   10075    
2022-08-16 18:15
 MDT
 K
 WS
 USGS-WRD
 14.0 18.9         1.1 6 1.95 180 0.00002 7.8         1.81                                                         0.59 0.03     1001 < 2.0       61   10.00 40.0       1   40 3071 30 2   0.0023     0.0009   30 40363 40368                     10075    
2022-10-04 16:00
 MDT
 K
 WS
 USGS-WRD
 12.2 12.8       0.0 0.85   1.94 1430 0.00003 7.6         2.42                                                         0.59 0.02     1001 < 2.0       100   10.00 100.0       1   70 3070 20 2   0.0011 0.0011 0.0000     1 40363 40368                     10079    
2023-03-21 15:30
 MDT
 K
 WS
 USGS-WRD
 4.00 1.0     630 1 0.50   1.91 213 0.00004 7.4 7.7 6.1 0.3 104 1.10 95.6 10   26.6 7.08 6.00 0.27 12 0.89 0.92 20.9 0.33 15.3 5.8 7.1 0.038 0.05 1.0 1.5 150 83.2 0.024 0.09 37.1 31.1 2.8 3   0.58 0.01 85.8   1001 < 2.0 1.3 130 0.18 58 M  10.00 0.0       < 0.5   70 3070   2 215 0.0012 0.0007 0.0005     1 40381 40382               20587       10078 20230000
2023-04-11 13:30
 MDT
 K
 WS
 USGS-WRD
 20.0 3.2   59.0 629 1 13   2.32 175 0.00001 7.9   1.6 0.2 76.2 2.67                                                         0.71 0.38 62.8   1001 E 4.2 5.8       M  10.00 130.0           40 3070   2             1 40375 40368               20621     10079    
2023-05-09 16:30
 MDT
 K
 WS
 USGS-WRD
 22.0 6.3     635 1 59 10 2.80 95 0.00002 7.7   1.4 0.1 46.6 3.84                                                         0.85 1.7 38.3   1001 3.1 3.7       0.0 10.00 200.0   3 5     10 3044   2             1 40375 40368               20643     10079    
2023-05-23 15:30
 MDT
 K
 WS
 USGS-WRD
 34.2 9.5   66.0 643 1 138 10 3.19 66 0.00004 7.5                                                                   0.97 3.9     1001   5.5         10.00 50.0   3 5     10 3044   2             1 40381 40382                     10079    

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