Table 4.  Results of Wilcoxon signed-rank test for bias in constituent data for the National Water Quality Laboratory

[Most probable value, Median bias, and Nearest reporting unit reported in same units as Minimum Reporting Limit; WWR, whole-water recoverable; TITR, electrometric titration; mg/L, milligrams per liter; POS, positive bias; --, acceptable results; DIS, dissolved; ICP-AES, inductively coupled plasma-atomic emission spectrometry; mg/L, micrograms per liter; NEG, negative bias; ICP-MS, inductively coupled plasma-mass spectrometry; DCP-AES, direct current plasma-atomic emission spectrometry; HG-AAS, hydride generation-atomic absorption spectrophotometry; GF-AAS, graphite furnace-atomic absorption spectrophotometry; USEPA, U.S. Environmental Protection Agency; IC, ion chromatography; LL, low level; GRAV, gravimetric; ISE, ion-selective electrode; F-AAS, flame-atomic absorption spectrophotometry; CV-AAS, cold vapor-atomic absorption spectrophotometry; ELEC, electrometric; mS/cm, microsiemens per centimeter; COL, colorimetric; ASF, micro-Kjeldahl digestion, automated segmented flow, colorimetric]

 

Constituent and

method of analysis

Most probable value

Number of determinations

Median bias

Nearest reporting unit

p-value

Bias

 

INORGANIC CONSTITUENTS

 

 

Alkalinity (WWR,TITR) Minimum Reporting Limit 1 mg/L

 

9.08

22

1.29

0.1

0.00000

POS

 

18.2

30

1.0

1

0.00000

--

 

55.7

16

-0.1

1

0.27444

--

 

75.2

24

-0.2

1

0.03664

--

 

76.0

27

2.5

1

0.00000

POS

 

88.5

18

0.0

1

0.94080

--

 

94.2

30

0.4

1

0.00036

--

 

107.5

34

2.0

1

0.00000

POS

 

114.0

26

2.7

1

0.00000

POS

 

129.7

14

2.8

1

0.00012

POS

Aluminum (DIS, ICP-AES) Minimum Reporting Limit 10 mg/L

 

7.63

3

3.95

0.1

0.25000

--

 

26.30

4

1.68

0.1

0.12500

--

 

26.45

12

0.19

0.1

0.73340

--

 

28.48

8

-1.95

0.1

0.03906

NEG

 

33.48

4

0.91

0.1

0.37500

--

Aluminum (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

7.6

32

0.4

1

0.00000

--

 

11.1

32

0.3

1

0.00247

--

 

44.9

32

-2.5

1

0.00000

NEG

Aluminum (WWR, DCP-AES) Minimum Reporting Limit 10 mg/L

 

26

4

8

10

0.62500

--

 

26

4

5

10

0.87500

--

 

28

8

-1

10

0.72656

--

 

33

4

12

10

0.37500

--

 

45

8

-2

10

0.71094

--

 

45

8

8

10

0.01563

--

Antimony (DIS, HG-AAS) Minimum Reporting Limit 1 mg/L

 

12.4

4

0.5

1

0.25000

--

 

14.7

4

0.2

1

0.87500

--

 

16.1

4

0.0

1

0.87500

--

Antimony (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

3.9

32

0.4

1

0.00000

--

 

8.3

32

0.4

1

0.00000

--

 

12.7

32

0.9

1

0.00000

--

Arsenic (DIS, HG-AAS) Minimum Reporting Limit 1 mg/L

 

1.8

8

0.2

1

0.00781

--

 

3.1

12

0.3

1

0.05127

--

 

7.6

21

0.4

1

0.69287

--

 

7.9

4

1.1

1

0.12500

--

 

11.4

8

0.6

1

0.35938

--

 

12.5

14

0.0

1

0.11133

--

 

13.9

4

-0.9

1

0.62500

--

Arsenic (WWR, GF-AAS, USEPA) Minimum Reporting Limit 1 mg/L

 

7.6

4

-0.5

1

0.12500

--

 

11.4

4

0.1

1

1.00000

--

Arsenic (WWR, HG-AAS) Minimum Reporting Limit 1 mg/L

 

1.8

8

0.2

1

0.00781

--

 

7.6

8

0.4

1

0.32031

--

 

7.7

8

0.3

1

0.53125

--

 

11.4

8

0.6

1

0.01563

--

 

12.5

8

1.0

1

0.13281

--

Barium (DIS, ICP-AES) Minimum Reporting Limit 1 mg/L

 

32.5

8

-0.9

1

0.10938

--

 

40.6

26

-0.3

1

0.81470

--

 

41.0

8

0.0

1

0.84375

--

 

59.5

22

0.3

1

0.39316

--

 

59.8

24

0.1

1

0.59798

--

 

61.4

8

1.6

1

0.02344

POS

Barium (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

16.3

32

0.1

1

0.63431

--

 

41.0

32

0.8

1

0.00004

--

 

59.5

32

1.2

1

0.00000

POS

Beryllium (DIS, ICP-AES) Minimum Reporting Limit 1 mg/L

 

6.43

24

0.02

0.1

0.73957

--

 

8.77

22

0.03

0.1

0.06501

--

 

9.57

26

0.0

0.1

0.76710

--

Beryllium (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

1.3

32

0.0

1

0.07286

--

 

4.3

32

0.0

1

0.18195

--

 

8.8

32

0.0

1

0.67354

--

Boron (DIS, ICP-AES) Minimum Reporting Limit 16 mg/L

 

5.00

5

-0.59

0.1

0.75000

--

 

17.90

16

-1.90

0.1

0.00134

NEG

 

20.70

8

0.23

0.1

0.74219

--

 

25.80

8

1.03

0.1

0.38281

--

 

37.65

18

1.50

0.1

0.36339

--

 

100.0

27

2.9

1

0.00000

POS

 

105.0

30

-0.6

1

0.23505

--

 

116.9

34

0.7

1

0.02109

--

 

158.4

14

3.1

1

0.00037

POS

Boron (WWR,DCP-AES) Minimum Reporting Limit 10 mg/L

 

25

4

-6

10

0.37500

--

 

26

4

2

10

1.00000

--

 

38

4

-5

10

0.62500

--

Cadmium (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

1.7

8

0.1

1

0.12500

--

 

3.4

8

0.0

1

0.90625

--

 

7.0

8

0.0

1

0.57031

--

 

7.2

8

0.1

1

0.56250

--

 

9.6

8

0.0

1

0.57031

--

 

14.3

8

0.5

1

0.46094

--

Cadmium (DIS, ICP-AES) Minimum Reporting Limit 8 mg/L

 

7.0

13

1.9

1

0.00439

POS

 

8.4

26

-0.4

1

0.89085

--

 

14.2

22

-0.6

1

0.43919

--

Cadmium (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

1.7

32

0.0

1

0.11706

--

 

9.6

32

0.1

1

0.23892

--

 

14.2

32

-0.2

1

0.00137

--

Cadmium (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

1.7

10

0.0

1

0.81250

--

 

3.4

16

-0.1

1

0.25708

--

 

7.0

14

-0.1

1

0.51135

--

 

8.4

8

-0.3

1

0.08594

--

 

9.6

8

-0.3

1

0.14844

--

 

14.2

8

-0.1

1

0.38281

--

 

14.3

8

-0.8

1

0.19531

--

Calcium (DIS, ICP-AES) Minimum Reporting Limit 0.02 mg/L

 

3.33

22

-0.01

0.1

0.30971

--

 

9.53

14

-0.06

0.1

0.46313

--

 

25.1

16

-0.2

1

0.10458

--

 

37.0

24

-1.1

1

0.00034

NEG

 

40.5

26

0.3

1

0.04089

--

 

41.2

24

0.4

1

0.06609

--

 

42.2

22

0.3

1

0.07849

--

 

44.2

16

0.6

1

0.23120

--

 

45.9

18

-0.2

1

0.52261

--

 

47.1

26

-0.9

1

0.00056

--

 

52.2

18

-1.3

1

0.00560

NEG

 

58.1

14

-1.3

1

0.01660

NEG

Chloride (DIS, IC) Minimum Reporting Limit 0.1 mg/L

 

8.35

21

0.29

0.1

0.00011

POS

 

16.7

30

0.1

1

0.36890

--

 

29.6

24

0.7

1

0.00321

--

 

31.5

16

0.9

1

0.01550

--

 

45.4

18

0.3

1

0.26453

--

 

46.0

27

0.2

1

0.15293

--

 

62.7

30

2.2

1

0.00000

POS

 

69.0

26

1.6

1

0.00013

POS

 

78.5

34

0.2

1

0.22678

--

 

85.3

14

0.6

1

0.50159

--

Chloride (DIS, IC, LL) Minimum Reporting Limit 0.01 mg/L

 

1.20

5

0.02

0.1

0.06250

--

 

1.30

4

-0.01

0.1

0.87500

--

 

7.79

3

0.34

0.1

1.00000

--

Chromium (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

4.85

10

0.15

0.1

0.61133

--

 

9.70

16

0.35

0.1

0.00012

POS

 

16.5

6

1.5

1

0.06250

--

 

18.5

8

0.3

1

0.32813

--

 

27.8

8

-0.4

1

0.66406

--

Chromium (DIS, ICP-AES) Minimum Reporting Limit 14 mg/L

 

11.5

12

3.5

1

0.00146

POS

 

16.5

24

1.3

1

0.00074

POS

 

26.2

22

1.6

1

0.00019

POS

Chromium (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

4.9

32

0.0

1

0.88591

--

 

18.5

32

-0.2

1

0.00024

--

 

26.2

32

-1.1

1

0.00000

NEG

Chromium (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

9.70

8

-0.05

0.1

0.67188

--

 

11.5

8

-0.1

1

0.52344

--

 

16.5

8

-0.6

1

0.38281

--

 

18.5

8

-0.4

1

0.14844

--

 

26.2

8

-1.3

1

0.25000

--

 

27.8

8

-0.9

1

0.10938

--

Cobalt (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

8.5

6

0.4

1

0.18750

--

Cobalt (DIS, ICP-AES) Minimum Reporting Limit 12 mg/L

 

8.4

6

1.1

1

0.31250

--

 

13.5

22

0.5

1

0.08154

--

Cobalt (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

8.5

32

0.0

1

0.26020

--

 

13.5

32

-0.1

1

0.00982

--

Cobalt (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

2.0

8

0.0

1

0.64063

--

 

8.4

8

0.5

1

0.31250

--

 

13.5

8

0.5

1

0.07813

--

Copper (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

0.95

5

0.05

0.1

0.06250

--

 

4.7

8

0.1

1

0.46094

--

 

7.5

8

1.0

1

0.01563

--

 

11.2

8

0.7

1

0.03125

--

 

16.7

8

0.4

1

0.05469

--

Copper (DIS, ICP-AES) Minimum Reporting Limit 10 mg/L

 

12

26

0

10

0.14029

--

 

17

22

0

10

0.53920

--

Copper (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

11.2

32

0.3

1

0.00002

--

 

16.7

32

0.0

1

0.21890

--

Copper (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

0.95

7

0.15

0.1

0.01563

POS

 

4.7

14

-0.2

1

0.13135

--

 

11.2

8

0.0

1

0.58594

--

 

12.0

8

-0.1

1

0.78125

--

 

16.7

8

0.1

1

0.92188

--

 

16.7

8

0.8

1

0.07813

--

Dissolved Solids (DIS, GRAV) Minimum Reporting Limit 10 mg/L

 

37.8

22

3.3

1

0.01783

POS

 

75.5

29

2.5

1

0.01583

POS

 

208.8

16

3.3

1

0.00015

POS

 

266.5

24

4.0

1

0.01043

POS

 

284.0

27

5.0

1

0.00000

POS

 

359.5

30

4.5

1

0.00021

POS

 

376.0

17

9.0

1

0.00002

POS

 

426.0

26

3.5

1

0.00583

POS

 

469.0

34

6.0

1

0.00102

POS

 

518.5

14

7.5

1

0.01270

POS

Fluoride (DIS, IC, LL) Minimum Reporting Limit 0.01 mg/L

 

0.040

4

0.004

0.01

0.87500

--

 

0.110

5

0.005

0.01

0.81250

--

 

0.139

4

0.017

0.01

0.12500

--

Fluoride (DIS, ISE) Minimum Reporting Limit 0.1 mg/L

 

0.18

21

0.02

0.1

0.00155

--

 

0.36

29

0.03

0.1

0.00000

--

 

0.52

27

0.03

0.1

0.00114

--

 

0.55

18

0.02

0.1

0.02003

--

 

0.63

24

0.05

0.1

0.00001

--

 

0.67

15

0.04

0.1

0.00012

--

 

0.78

24

0.04

0.1

0.00001

--

 

0.80

34

0.04

0.1

0.00000

--

 

0.88

30

0.05

0.1

0.00000

--

 

0.92

14

0.05

0.1

0.00403

--

Iron (DIS, ICP-AES) Minimum Reporting Limit 10 mg/L

 

17.8

31

1.0

1

0.12334

--

 

35.5

16

2.5

1

0.03354

POS

 

39.3

24

-3.0

1

0.00000

NEG

 

54.3

26

-1.5

1

0.00119

NEG

 

55.1

37

-2.0

1

0.00018

NEG

 

111

8

-3

10

0.00781

--

 

147

18

-2

10

0.10838

--

 

162

22

-5

10

0.00219

--

 

167

8

2

10

0.25000

--

Iron (WWR, F-AAS) Minimum Reporting Limit 10 mg/L

 

18

10

4

10

0.07617

--

 

36

16

5

10

0.00113

--

 

54

8

-2

10

1.00000

--

 

55

14

3

10

0.26050

--

 

111

8

-6

10

0.10938

--

 

162

8

-9

10

0.01563

--

 

167

8

-2

10

0.48438

--

Lead (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

1.6

8

0.1

1

0.55469

--

 

3.2

8

-0.3

1

0.10156

--

 

5.4

8

-0.1

1

0.08594

--

 

5.8

8

-0.1

1

0.07031

--

 

41.7

8

0.8

1

0.05469

--

 

62.6

8

3.2

1

0.00781

POS

Lead (DIS, ICP-AES) Minimum Reporting Limit 100 mg/L

 

48

5

2

10

0.81250

--

Lead (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

1.6

32

0.0

1

0.88342

--

 

41.7

32

0.0

1

0.89829

--

 

48.1

32

-0.3

1

0.21900

--

Lead (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

1.6

10

0.1

1

0.48242

--

 

3.2

16

0.1

1

0.40942

--

 

5.8

14

-0.1

1

0.89050

--

 

8.6

8

0.2

1

0.29688

--

 

41.7

8

-0.2

1

0.77344

--

 

48.1

8

-0.3

1

0.94531

--

 

62.6

8

3.4

1

0.07813

--

Lithium (DIS, ICP-AES) Minimum Reporting Limit 6 mg/L

 

4.4

8

1.5

1

0.01563

POS

 

9.0

8

1.1

1

0.00781

POS

 

11.2

24

2.0

1

0.00000

POS

 

13.5

8

1.4

1

0.00781

POS

 

22.7

22

1.4

1

0.00000

POS

 

23.0

26

1.9

1

0.00000

POS

Lithium (WWR, F-AAS) Minimum Reporting Limit 10 mg/L

 

23

7

0

10

0.89063

--

 

23

4

0

10

1.00000

--

Magnesium (DIS, ICP-AES) Minimum Reporting Limit 0.01 mg/L

 

0.925

22

-0.010

0.01

0.05983

--

 

2.53

14

0.01

0.1

0.79517

--

 

7.43

16

-0.24

0.1

0.00006

NEG

 

9.34

26

-0.10

0.1

0.00537

NEG

 

9.54

22

-0.10

0.1

0.25841

--

 

10.1

16

0.1

1

0.77225

--

 

10.1

24

0.0

1

0.40287

--

 

10.3

18

0.0

1

0.31165

--

 

11.2

24

-0.5

1

0.00000

--

 

11.5

26

-0.2

1

0.00010

--

 

13.9

14

-0.2

1

0.01294

--

 

14.2

18

-0.3

1

0.00001

--

Manganese (DIS, ICP-AES) Minimum Reporting Limit 4 mg/L

 

9.1

8

-0.2

1

0.14844

--

 

11.7

26

-0.1

1

0.39137

--

 

13.7

8

0.5

1

0.03906

--

 

19.6

22

-0.1

1

0.93754

--

 

24.5

31

-0.9

1

0.00000

--

 

49.0

16

-1.4

1

0.00003

NEG

 

50.2

24

-2.2

1

0.00000

NEG

 

58.1

18

-1.6

1

0.00033

NEG

 

74.1

37

-2.1

1

0.00000

NEG

Manganese (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

9.1

32

-0.1

1

0.00112

--

 

19.6

32

-0.7

1

0.00000

--

 

24.5

32

-1.2

1

0.00000

NEG

Manganese (WWR, F-AAS) Minimum Reporting Limit 10 mg/L

 

12

8

2

10

0.02344

--

 

14

8

1

10

0.06250

--

 

20

8

-1

10

1.00000

--

 

49

8

-5

10

0.01563

--

 

74

8

-3

10

0.04688

--

Mercury (DIS, CV-AAS) Minimum Reporting Limit 0.1 mg/L

 

0.26

8

-0.04

0.1

0.00781

--

 

0.76

16

0.08

0.1

0.39642

--

 

0.93

8

0.08

0.1

0.93750

--

 

3.32

16

0.20

0.1

0.06357

--

Mercury (WWR, CV-AAS) Minimum Reporting Limit 0.1 mg/L

 

0.26

8

-0.06

0.1

0.10938

--

 

0.76

8

0.00

0.1

0.82031

--

 

0.93

15

0.02

0.1

0.55054

--

 

3.32

16

0.02

0.1

0.55283

--

Molybdenum (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

2.22

5

0.58

0.1

0.62500

--

 

11.9

5

0.5

1

0.12500

--

Molybdenum (DIS, ICP-AES) Minimum Reporting Limit 60 mg/L

 

10

6

0

10

0.43750

--

 

12

4

0

10

0.62500

--

 

23

5

-11

10

0.62500

--

Molybdenum (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

2.2

32

0.1

1

0.00001

--

 

18.1

32

0.6

1

0.00000

--

 

22.7

32

0.4

1

0.00002

--

Molybdenum (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

10.4

8

-0.8

1

0.03906

--

 

12.1

8

-0.9

1

0.05469

--

 

22.7

8

0.3

1

0.94531

--

Nickel (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

3.8

5

0.4

1

0.06250

--

 

7.5

4

0.5

1

0.25000

--

 

14.1

5

0.9

1

0.06250

--

 

35.5

6

2.0

1

0.03125

POS

Nickel (DIS, ICP-AES) Minimum Reporting Limit 40 mg/L

 

12

4

4

10

0.02500

--

 

15

6

2

10

0.56250

--

 

41

22

1

10

0.03200

--

Nickel (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

3.8

32

0.3

1

0.00000

--

 

35.5

32

-0.4

1

0.01415

--

 

41.0

32

-1.1

1

0.00000

NEG

Nickel (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

7.5

8

0.7

1

0.00781

--

 

12.1

8

0.5

1

0.00781

--

 

14.5

8

0.6

1

0.10938

--

 

35.5

8

2.2

1

0.00781

POS

 

41

8

1.9

1

0.01563

POS

 

53.3

8

4.0

1

0.05469

--

Potassium (DIS, F-AAS) Minimum Reporting Limit 0.1 mg/L

 

0.46

22

-0.02

0.1

0.00000

--

 

0.91

30

-0.03

0.1

0.00217

--

 

2.01

16

-0.03

0.1

0.29694

--

 

2.20

24

-0.04

0.1

0.41355

--

 

2.49

18

-0.04

0.1

0.47470

--

 

3.27

27

-0.01

0.1

0.36439

--

 

4.18

30

-0.05

0.1

0.20736

--

 

4.47

34

-0.05

0.1

0.36349

--

 

4.90

26

0.02

0.1

0.83387

--

 

5.50

14

0.12

0.1

0.03406

POS

Potassium (DIS, F-AAS, LL) Minimum Reporting Limit 0.01 mg/L

 

0.118

5

0.001

0.01

0.37500

--

 

0.146

4

0.003

0.01

0.25000

--

 

0.550

4

0.008

0.01

0.12500

--

Selenium (DIS, HG-AAS) Minimum Reporting Limit 1 mg/L

 

2.2

31

-0.9

1

0.00000

--

 

3.1

12

-0.5

1

0.00049

--

 

4.8

8

-0.2

1

0.46094

--

 

5.5

4

-0.8

1

0.25000

--

 

7.2

8

0.3

1

0.25000

--

 

7.5

22

-0.1

1

0.88780

--

 

9.7

4

0.6

1

0.37500

--

 

9.9

19

0.6

1

0.91347

--

Selenium (WWR, GF-AAS, USEPA) Minimum Reporting Limit 1 mg/L

 

4.8

4

0.5

1

0.12500

--

 

7.2

4

0.6

1

0.12500

--

Selenium (WWR, HG-AAS) Minimum Reporting Limit 1 mg/L

 

2.2

8

-0.9

1

0.00781

--

 

4.8

8

0.0

1

0.74219

--

 

7.2

8

-0.1

1

0.74219

--

 

7.5

8

0.0

1

1.00000

--

 

9.9

8

0.0

1

0.54688

--

Silica (DIS, COL) Minimum Reporting Limit 0.1 mg/L

 

2.24

22

-0.04

0.1

0.35836

--

 

6.35

18

-0.21

0.1

0.00011

NEG

 

8.15

24

0.04

0.1

0.83553

--

 

8.54

16

0.15

0.1

0.19281

--

 

9.75

25

-0.22

0.1

0.02308

NEG

 

11.1

14

-0.4

1

0.01343

--

Silica (DIS, ICP-AES) Minimum Reporting Limit 0.1 mg/L

 

1.74

14

-0.07

0.1

0.00012

--

 

4.47

30

-0.16

0.1

0.00000

NEG

 

6.50

26

-0.22

0.1

0.00000

NEG

 

7.55

24

-0.06

0.1

0.00119

--

 

8.14

16

-0.05

0.1

0.85034

--

 

9.17

34

-0.35

0.1

0.00000

NEG

 

10.3

26

-0.1

1

0.00035

--

 

11.0

29

-0.3

1

0.00000

--

 

15.2

18

-0.4

1

0.00026

--

 

17.4

22

-0.6

1

0.00001

--

Silver (DIS, GF-AAS) Minimum Reporting Limit 1 mg/L

 

9.9

8

-1.1

1

0.00781

NEG

 

14.9

8

-0.1

1

0.29688

--

Silver (DIS, ICP-AES) Minimum Reporting Limit 4 mg/L

 

4.9

14

-0.1

1

0.38208

--

 

13.7

14

-2.6

1

0.00012

NEG

Silver (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

9.9

32

-1.3

1

0.00000

NEG

 

13.7

32

-2.3

1

0.00000

NEG

Silver (WWR, GF-AAS) Minimum Reporting Limit 1 mg/L

 

4.9

8

-0.1

1

0.28906

--

 

9.9

8

-1.2

1

0.00781

NEG

 

13.7

8

-2.1

1

0.00781

NEG

 

14.9

8

0.3

1

0.14844

--

Sodium (DIS, ICP-AES) Minimum Reporting Limit 0.2 mg/L

 

5.50

14

-0.05

0.1

0.42627

--

 

7.90

22

-0.05

0.1

0.02980

--

 

28.0

18

0.1

1

0.21214

--

 

33.5

16

0.2

1

0.70572

--

 

35.4

24

0.2

1

0.93384

--

 

37.6

22

0.0

1

0.40216

--

 

39.2

24

-0.1

1

0.40287

--

 

49.9

18

0.1

1

0.29869

--

 

56.5

16

1.0

1

0.05066

--

 

66.1

26

0.1

1

0.97050

--

 

81.0

26

-0.7

1

0.03564

--

 

96.2

14

-0.7

1

0.13525

--

Specific Conductance (WWR, ELEC, LL) Minimum Reporting Limit 0.5 mS/cm

 

13.3

5

-0.5

1

0.43750

--

 

20.9

4

0.0

1

1.00000

--

 

36.1

4

1.3

1

0.25000

--

Strontium (DIS, ICP-AES) Minimum Reporting Limit 1 mg/L

 

115

8

-1

10

0.31250

--

 

153

8

-2

10

0.25000

--

 

230

8

7

10

0.03906

--

 

255

22

-1

10

0.56038

--

 

273

24

3

10

0.00634

--

 

302

26

4

10

0.01828

--

Sulfate (DIS, IC) Minimum Reporting Limit 0.1 mg/L

 

7.00

21

-0.41

0.1

0.00000

NEG

 

14.0

30

-0.9

1

0.00000

--

 

58.5

16

-1.2

1

0.00015

NEG

 

75.0

27

-0.4

1

0.00218

--

 

89.0

54

-0.6

1

0.00862

--

 

113

26

0

10

0.60359

--

 

114

52

-1

10

0.00014

--

 

132

14

-1

10

0.17261

--

Vanadium (DIS, ICP-AES) Minimum Reporting Limit 10 mg/L

 

8.4

5

-0.3

1

1.00000

--

 

11.8

24

0.1

1

0.78181

--

 

20.9

22

0.4

1

0.23168

--

Zinc (DIS, ICP-AES) Minimum Reporting Limit 20 mg/L

 

10.5

4

2.0

1

0.12500

--

 

15.0

15

6.7

1

0.00085

POS

 

24.8

8

3.1

1

0.05469

--

 

39.9

24

0.8

1

0.59798

--

Zinc (DIS, ICP-MS) Minimum Reporting Limit 1 mg/L

 

10.0

32

1.7

1

0.00000

POS

 

12.4

32

1.4

1

0.00000

POS

 

15.0

32

2.5

1

0.00000

POS

Zinc (WWR, F-AAS) Minimum Reporting Limit 10 mg/L

 

10

8

3

10

0.01563

--

 

11

8

2

10

0.00781

--

 

12

8

3

10

0.00195

--

 

15

16

4

10

0.00360

--

 

25

16

0

10

0.31619

--

 

40

14

2

10

0.01953

--

 

NUTRIENT CONSTITUENTS

Ammonia as nitrogen (DIS, COL) Minimum Reporting Limit 0.02 mg/L

 

0.210

60

0.026

0.01

0.00001

POS

 

0.240

54

-0.012

0.01

0.06591

--

 

0.498

60

0.004

0.01

0.41528

--

 

0.620

62

0.054

0.01

0.00000

POS

 

1.24

96

0.05

0.1

0.00000

--

Ammonia as nitrogen (DIS, COL, LL) Minimum Reporting Limit 0.002 mg/L

 

0.2100

36

-0.0140

0.001

0.00000

NEG

 

0.2400

30

-0.0130

0.001

0.00000

NEG

Ammonia as nitrogen (DIS, USEPA) Minimum Reporting Limit 0.02 mg/L

 

0.210

3

-0.022

0.01

0.25000

--

 

0.240

3

-0.035

0.01

0.25000

--

 

0.498

6

0.002

0.01

1.00000

--

 

0.620

5

-0.036

0.01

0.12500

--

Ammonia plus organic nitrogen as nitrogen (DIS, ASF) Minimum Reporting Limit 0.1 mg/L

 

0.29

60

-0.06

0.1

0.00000

--

 

0.30

59

-0.03

0.1

0.00047

--

 

0.75

60

-0.04

0.1

0.00000

--

 

0.86

95

0.00

0.1

0.38038

--

 

0.91

59

0.02

0.1

0.03868

--

Ammonia plus organic nitrogen as nitrogen (DIS, USEPA) Minimum Reporting Limit 0.1 mg/L

 

0.285

9

-0.045

0.01

0.12500

--

 

0.300

7

-0.024

0.01

0.17188

--

 

0.750

9

-0.012

0.01

0.44531

--

 

0.910

9

0.022

0.01

0.64063

--

Ammonia plus organic nitrogen as nitrogen (WWR, ASF) Minimum Reporting Limit 0.1 mg/L

 

0.29

60

-0.07

0.1

0.00000

--

 

0.30

46

-0.02

0.1

0.00833

--

 

0.75

60

-0.04

0.1

0.00000

--

 

0.91

59

0.00

0.1

0.69543

--

Ammonia plus organic nitrogen as nitrogen (WWR, USEPA) Minimum Reporting Limit 0.1 mg/L

 

0.29

9

-0.07

0.1

0.00781

--

 

0.30

7

0.00

0.1

0.81250

--

 

0.75

9

-0.03

0.1

0.16406

--

 

0.91

9

0.01

0.1

0.91016

--

Nitrate plus nitrite as nitrogen (DIS, COL) Minimum Reporting Limit 0.05 mg/L

 

0.220

60

-0.004

0.01

0.10353

--

 

0.443

54

-0.008

0.01

0.11066

--

 

0.747

60

-0.037

0.01

0.00000

NEG

 

1.01

62

-0.02

0.1

0.00016

--

 

1.04

96

0.03

0.1

0.00011

--

Nitrate plus nitrite as nitrogen (DIS, COL, LL) Minimum Reporting Limit 0.005 mg/L

 

0.220

36

-0.013

0.01

0.00000

NEG

 

0.443

30

-0.011

0.01

0.00000

NEG

Orthophosphate as phosphorus (DIS, COL) Minimum Reporting Limit 0.01 mg/L

 

0.195

60

0.005

0.01

0.05772

--

 

0.580

54

0.054

0.01

0.00000

POS

 

0.658

59

-0.032

0.01

0.00000

NEG

 

0.758

62

0.001

0.01

0.98840

--

 

1.01

96

0.00

0.1

0.42110

--

Orthophosphate as phosphorus (DIS, COL, LL) Minimum Reporting Limit 0.001 mg/L

 

0.195

36

0.004

0.01

0.10731

--

 

0.580

30

0.007

0.01

0.00005

--

Phosphorus (DIS, ASF) Minimum Reporting Limit 0.05 mg/L

 

0.201

60

-0.002

0.01

0.88725

--

 

0.602

60

0.003

0.01

0.31645

--

 

0.715

60

0.008

0.01

0.00240

--

 

0.766

59

0.025

0.01

0.00020

POS

 

1.01

95

0.02

0.1

0.00003

--

Phosphorus (DIS, COL, LL) Minimum Reporting Limit 0.001 mg/L

 

0.201

18

0.007

0.01

0.35216

--

 

0.602

15

0.014

0.01

0.11029

--

Phosphorus (DIS, USEPA) Minimum Reporting Limit 0.05 mg/L

 

0.201

9

-0.008

0.01

0.58594

--

 

0.602

7

0.002

0.01

1.00000

--

 

0.715

9

0.018

0.01

0.73438

--

 

0.766

9

0.022

0.01

0.12500

--

Phosphorus (WWR, ASF) Minimum Reporting Limit 0.05 mg/L

 

0.201

60

0.003

0.01

0.32082

--

 

0.602

46

0.000

0.01

0.54222

--

 

0.715

60

0.007

0.01

0.12027

--

 

0.766

60

0.028

0.01

0.00000

POS

Phosphorus (WWR, COL, LL) Minimum Reporting Limit 0.001 mg/L

 

0.201

35

0.007

0.01

0.00239

--

 

0.602

30

0.019

0.01

0.17542

--

Phosphorus (WWR, USEPA) Minimum Reporting Limit 0.05 mg/L

 

0.201

9

0.012

0.01

0.37500

--

 

0.602

7

-0.006

0.01

0.81250

--

 

0.715

9

0.007

0.01

0.67188

--

 

0.766

9

0.040

0.01

0.03906

POS