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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 330937096260501 Lavon Lk nr US380

Collin County, Texas
Hydrologic Unit Code 12030106
Latitude  33°09'37", Longitude  96°26'05.2" NAD83
Gage datum 479 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 


Sam-
pling
depth,
feet
(00003)


Temper-
ature,
water,
deg C
(00010)


Temper-
ature,
air,
deg C
(00020)

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



Wind
speed,
mi/h
(00035)		 Wind
direc-
tion,
clkwise
from
north,
degrees
(00036)		 Reser-
voir
eleva-
tion
above
datum,
feet
(00062)
Number
of
sam-
pling
points,
count
(00063)		 Specif-
ic
conduc-
tance,
wat unf
uS/cm @
25 degC
(00095)		 Hydro-
gen
ion,
water,
unfltrd
calcd,
mg/L
(00191)


Dis-
solved
oxygen,
mg/L
(00300)
Dis-
solved
oxygen,
percent
of sat-
uration
(00301)
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
nitro-
gen,
water,
unfltrd
mg/L
(00605)

Ammonia
water,
fltrd,
mg/L
as N
(00608)

Nitrite
water,
fltrd,
mg/L
as N
(00613)

Nitrate
water,
fltrd,
mg/L
as N
(00618)		 Nitrate
+
nitrite
water,
fltrd,
mg/L
as N
(00631)
Ortho-
phos-
phate,
water,
fltrd,
mg/L
(00660)
Phos-
phorus,
water,
unfltrd
mg/L
as P
(00665)		 Ortho-
phos-
phate,
water,
fltrd,
mg/L
as P
(00671)

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


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)



Sample
volume,
liters
(32000)		 Alka-
linity,
wat flt
inf tit
field,
mg/L as
CaCO3
(39086)		 Trans-
parency
water,
in situ
Secchi
disc,
feet
(49701)


Site
visit
purpose
code
(50280)		 Total
nitro-
gen,
wat unf
by anal
ysis,
mg/L
(62855)		 Dis-
solved
solids,
sum of
consti-
tuents,
mg/L
(70301)
Dis-
solved
solids,
water,
tons/
acre-ft
(70303)


Ammonia
water,
fltrd,
mg/L
(71846)


Nitrate
water,
fltrd,
mg/L
(71851)

Nitrite
water,
fltrd,
mg/L
as NO2
(71856)



Sample
purpose
code
(71999)


Sam-
pling
method,
code
(82398)



Sampler
type,
code
(84164)		 Specif.
conduc-
tance,
wat unf
lab,
uS/cm @
25 degC
(90095)


Zebra
mussel
adults,
#/m2
(94424)


Zebra
mussel
larvae,
#/L
(94425)		 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)
0.16 N
Sulfur-
ic acid
titrant
lot
number
(99174)
0.45 um
capsule
filter
NWIS
lot
number
(99206)
2011-05-16 10:55
 CDT
 K
 WS
 USGSTXFL
 6.00 20.9   752       1 360 M  8.8 100 8.3 8.4 1.1 < 1 142 0.71 0.03 0.022 0.413 0.43 0.024 0.090 0.008 128 12 45.1 3.77 20.1 0.77 25 4.81 18.3 32.6 0.28 3.90   118   1099 1.17 201 0.27 0.033 1.83 0.073 10.00 50 4030 354              
2011-05-16 11:00
 CDT
 K
 WS
 USGSTXFL
 1.00 20.9 22.0 752       1 357 M  9.1 103 8.4 8.4 0.9 < 1 141 0.61 0.01 0.021 0.417 0.44 0.023 0.096 0.008 132 17 46.5 3.90 20.6 0.78 24 5.02 18.7 33.1 0.28 3.81   116 0.80 1099 1.07 203 0.28 0.019 1.84 0.070 10.00 50 4030 356   U           
2011-07-06 09:35
 CDT
 K
 WS
 USGS-WRD
 5.00 29.9   754         311 0.00002 6.4 85 7.7 7.9 2.9 < 1 97 < 1.0 0.01 0.002 < 0.018 < 0.02 0.021 0.113 0.007 89.9 10 29.7 3.82 23.3 1.07 35 4.95 21.0 30.1 0.33 4.66   80     1.06 166 0.23 0.017 < 0.079 0.007       306              
2011-07-06 09:40
 CDT
 K
 WS
 USGS-WRD
 1.00 29.9 31.1 754         310 0.00001 6.5 86 7.8 7.9 2.4 < 1 99 < 1.3 0.01 0.002 < 0.018 < 0.02 0.019 0.108 0.006 88.8 8 29.2 3.83 23.3 1.08 35 5.03 20.9 29.6 0.33 4.63   82 0.60   1.28 166 0.23 0.013 < 0.080 0.006       307   U           
2012-04-10 11:42
 CDT
 K
 WS
 USGS-WRD
 10.0 20.4   753         346 0.00003 5.8 65 7.6                                                                                          
2012-04-10 11:43
 CDT
 K
 WS
 USGS-WRD
 5.00 21.0   753         341 0.00001 8.2 92 8.0                                                                                          
2012-04-10 11:44
 CDT
 K
 WS
 USGS-WRD
 1.00 21.9 25.1 753 3.7       339 M  10.4 120 8.4                                                     1.6                         U           
2012-05-09 11:53
 CDT
 K
 WS
 USGS-WRD
 10.0 23.4   752         386 0.00002 5.9 70 7.6                                                                                          
2012-05-09 11:54
 CDT
 K
 WS
 USGS-WRD
 5.00 24.0   752         378 0.00001 7.9 95 8.0                                                                                          
2012-05-09 11:56
 CDT
 K
 WS
 USGS-WRD
 1.00 24.2 26.6 752 3.0       379 0.00001 8.1 98 8.0                                                     1.5                         U           
2012-06-01 11:00
 CDT
 K
 WS
 USGS-WRD
 8.40 24.5   750         345 0.00001 7.6 92 8.1 8.2 2.0 1 139 < 0.57 0.02 0.001 < 0.039 < 0.040 < 0.012 0.047 < 0.004 126 10 44.1 3.89 19.4 0.75 24 4.84 16.6 28.4 0.29 5.46   116     0.59 192 0.26 0.022 < 0.171 0.005       341              
2012-06-01 11:02
 CDT
 K
 WS
 USGS-WRD
 5.00 24.8   750         346 0.00001 7.5 92 8.0                                                                                          
2012-06-01 11:05
 CDT
 K
 WS
 USGS-WRD
 1.00 25.5 21.6 750 3.5       345 0.00001 7.8 96 8.1 8.1 1.8 1 141 < 0.37 0.01 0.001 < 0.039 < 0.040 < 0.012 0.034 < 0.004 127 10 44.5 3.93 19.5 0.75 24 4.80 16.5 28.1 0.29 5.59   118 1.7   0.38 194 0.26 0.019 < 0.171 0.004       332   U           
2012-06-19 12:11
 CDT
 K
 WS
 USGS-WRD
 8.00 27.1   749         367 0.00001 7.8 100 8.2                                                                                          
2012-06-19 12:12
 CDT
 K
 WS
 USGS-WRD
 5.00 27.1   749         367 0.00001 7.7 99 8.2                                                                                          
2012-06-19 12:13
 CDT
 K
 WS
 USGS-WRD
 1.00 27.1 28.7 749 14       368 0.00001 7.8 99 8.2                                                     1.4                         U           
2012-07-09 11:10
 CDT
 K
 WS
 USGS-WRD
 8.00 28.8   750         321 0.00002 6.8 89 7.7                                                                                          
2012-07-09 11:12
 CDT
 K
 WS
 USGS-WRD
 5.00 29.1   750         319 0.00001 8.7 114 8.1                                                                                          
2012-07-09 11:13
 CDT
 K
 WS
 USGS-WRD
 1.00 29.6 31.1 750 3.0       317 M  9.8 130 8.4                                                     1.2                         U           
2012-08-16 11:32
 CDT
 K
 WS
 USGS-WRD
 5.00 28.7   750         320 0.00001 7.4 97 8.1                                                                                          
2012-08-16 11:33
 CDT
 K
 WS
 USGS-WRD
 1.00 28.8 29.1 750 10   487.03   320 0.00001 7.8 102 8.2                                                                               U           
2012-09-11 11:41
 CDT
 K
 WS
 USGS-WRD
 4.00 25.1   753         332 0.00001 6.9 84 8.1 8.2 1.3 < 1 106 < 1.2 < 0.01 < 0.001 < 0.040 < 0.040 < 0.012 0.124 < 0.004 96.4 9 32.6 3.66 26.8 1.19 36 5.58 22.3 29.2 0.37 7.10   88     1.15 180 0.24 < 0.013 < 0.177 < 0.003       322              
2012-09-11 11:43
 CDT
 K
 WS
 USGS-WRD
 1.00 25.2 28.5 753 4.5   485.71   331 0.00001 7.4 91 8.2 8.3 1.2 < 1 110 < 1.1 < 0.01 < 0.001 < 0.040 < 0.040 < 0.012 0.130 < 0.004 97.1 7 32.8 3.67 26.9 1.19 36 5.60 22.4 29.4 0.33 7.36   91 0.50   1.15 182 0.25 < 0.013 < 0.177 < 0.003       322   U           
2015-04-14 11:48
 CDT
 K
 WS
 USGS-WRD
 6.00 19.9   750         495 0.00001 6.5 73 7.9                                                                                          
2015-04-14 11:49
 CDT
 K
 WS
 USGS-WRD
 5.00 19.9   750         498 0.00001 6.5 72 7.9                                                                                          
2015-04-14 11:50
 CDT
 K
 WS
 USGS-WRD
 1.00 19.9 14.4 750 6.6   488.39   493 0.00001 6.6 73 7.9                                                     1.5                                    
2015-05-11 11:32
 CDT
 K
 WS
 USGS-WRD
 12.0 20.9   772         207 0.00004 5.4 60 7.4                                                                                          
2015-05-11 11:34
 CDT
 K
 WS
 USGS-WRD
 10.0 20.9   772         208 0.00003 5.4 60 7.5                                                                                          
2015-05-11 11:35
 CDT
 K
 WS
 USGS-WRD
 5.00 20.9   772         212 0.00003 5.4 59 7.5                                                                                          
2015-05-11 11:36
 CDT
 K
 WS
 USGS-WRD
 1.00 21.0 19.0 772 5.9   495.98   215 0.00003 5.3 59 7.5                                                     0.40                                    
2015-06-10 09:58
 CDT
 K
 WS
 USGS-WRD
 20.0 22.2   767         375 0.00004 0.4 5 7.4                                                                                          
2015-06-10 09:59
 CDT
 K
 WS
 USGS-WRD
 15.0 24.8   767         369 0.00004 0.3 3 7.4                                                                                          
2015-06-10 10:00
 CDT
 K
 WS
 USGS-WRD
 10.0 28.7   767         333 0.00001 9.5 122 8.3                                                                                          
2015-06-10 10:01
 CDT
 K
 WS
 USGS-WRD
 5.00 29.8   767         340 M  11.8 155 8.7                                                                                          
2015-06-10 10:02
 CDT
 K
 WS
 USGS-WRD
 1.00 30.1 29.6 767 3.2   503.12   340 M  11.9 156 8.8                                                     4.1                                    
2015-07-22 11:58
 CDT
 K
 WS
 USGS-WRD
 10.0 30.3   768         354 0.00002 5.3 70 7.8                                                                                          
2015-07-22 11:59
 CDT
 K
 WS
 USGS-WRD
 5.00 30.5   768         344 0.00001 7.5 99 8.1                                                                                          
2015-07-22 12:00
 CDT
 K
 WS
 USGS-WRD
 1.00 30.5 29.2 768 7.4   493.82   343 0.00001 7.6 101 8.2                                                     3.2                         U           
2015-09-09 11:21
 CDT
 K
 WS
 USGS-WRD
 7.00 29.5   747         304 0.00001 5.8 77 7.9                                                                                          
2015-09-09 11:22
 CDT
 K
 WS
 USGS-WRD
 5.00 29.5   747         304 0.00001 5.8 77 7.9                                                                                          
2015-09-09 11:23
 CDT
 K
 WS
 USGS-WRD
 1.00 29.5 25.1 747 2.0   489.88   305 0.00001 5.8 78 7.9                                                     1.4                                    
2015-09-28 11:27
 CDT
 K
 WS
 USGS-WRD
 6.00 25.4   747         343 0.00002 4.8 60 7.8                                                                                          
2015-09-28 11:28
 CDT
 K
 WS
 USGS-WRD
 5.00 25.5   747         343 0.00002 5.1 63 7.8                                                                                          
2015-09-28 11:29
 CDT
 K
 WS
 USGS-WRD
 1.00 25.9 26.6 747 2.3   488.94   341 0.00001 6.1 76 7.9                                                     1.4                       U  U           
2018-09-14 12:33
 CDT
 K
 WS
 USGS-WRD
 6.00 26.6   755         322 M  8.3 104 8.6                                                                                 1        
2018-09-14 12:34
 CDT
 K
 WS
 USGS-WRD
 5.00 26.7   755         328 M  9.4 118 8.7                                                                                 1        
2018-09-14 12:35
 CDT
 K
 WS
 USGS-WRD
 1.00 26.7 27.8 755 6.1 47 487.93   327 M  9.2 115 8.8                                                 1000   0.70                         U  1        
2019-08-22 14:29
 CDT
 K
 WS
 USGS-WRD
 8.00 30.4   746         242 0.00001 4.4 60 8.1 8.1 1.3 0.3 97.3 < 1.3 0.03 < 0.001 < 0.040 < 0.040 0.043 0.214 0.014 88.6 8 31.7 2.30 12.3 0.57 22 3.90 9.75 16.6 0.24 9.20   80     1.29 134 0.18 0.039 < 0.177 < 0.003       240     1 40296 40282 20381 10062
2019-08-22 14:30
 CDT
 K
 WS
 USGS-WRD
 5.00 31.5   746         238 M  8.3 116 8.6                                                                                 1        
2019-08-22 14:31
 CDT
 K
 WS
 USGS-WRD
 1.00 31.6 37.2 746 6.9 222 489.88   238 M  8.9 124 8.7 8.6 0.3 2.8 90.8 < 0.85 < 0.01 < 0.001 < 0.040 < 0.040 < 0.012 0.084 < 0.004 84.0 5 29.5 2.52 13.2 0.63 24 4.01 11.2 19.1 0.24 7.68 172 79 0.80   0.85 135 0.18 < 0.013 < 0.177 < 0.003       234   U  1 40296 40282 20390 10062

Water Quality Remark Code Description
< Less than
M Presence verified but not quantified
U Analyzed for but not detected