Drexel Water Treatment Plant, Missouri 

PWSID: MO1010225

 

Atrazine Concentration

Sample Date

Raw 

Water 

Atrazine

(PPB)

Raw Water 

Method of 

Analysis

Finished 

Water 

Atrazine

(PPB)

Finished 

Water 

Method of 

Analysis

24-Apr-06 1.67 LCMS-1 0.54 LCMS-1 

2-May-06 0.81 LCMS-1 0.87 LCMS-1 

8-May-06 0.93 LCMS-1 0.66 LCMS-1 

15-May-06 1.46 LCMS-1 1.22 LCMS-1 

22-May-06 0.89 LCMS-1 0.54 LCMS-1 

30-May-06 1.17 LCMS-1 0.65 LCMS-1 

7-Jun-06 2.02 LCMS-1 1.10 LCMS-1 

12-Jun-06 1.19 LCMS-1 1.06 LCMS-1 

19-Jun-06 0.79 LCMS-1 0.62 LCMS-1 

26-Jun-06 1.48 LCMS-1 0.57 LCMS-1 

5-Jul-06 1.10 LCMS-1 0.62 LCMS-1 

10-Jul-06 0.94 LCMS-1 0.57 LCMS-1 

17-Jul-06 0.98 LCMS-1 0.55 LCMS-1 

24-Jul-06 1.12 LCMS-1 0.75 LCMS-1 

17-Aug-06 0.87 LCMS-1 0.63 LCMS-1 

28-Aug-06 0.61 LCMS-1 0.41 LCMS-1 

11-Sep-06 0.36 LCMS-1 0.16 LCMS-1 

25-Sep-06 0.94 LCMS-1 0.58 LCMS-1 

10-Oct-06 0.76 LCMS-1 0.41 LCMS-1 

23-Oct-06 0.63 LCMS-1 0.43 LCMS-1 

6-Nov-06 0.68 LCMS-1 0.43 LCMS-1 

20-Nov-06 0.58 LCMS-1 0.47 LCMS-1 

19-Dec-06 0.53 LCMS-1 0.42 LCMS-1 

2-Jan-07 0.74 LCMS-1 0.62 LCMS-1 

16-Jan-07 0.45 LCMS-1 0.34 LCMS-1 

30-Jan-07 0.47 LCMS-2 0.40 LCMS-2 

26-Feb-07 0.60 LCMS-2 0.27 LCMS-2 

12-Mar-07 0.44 LCMS-2 0.30 LCMS-2 

26-Mar-07 0.48 LCMS-2 0.11 LCMS-2 

2-Apr-07 0.46 LCMS-2 0.12 LCMS-2 

9-Apr-07 0.52 LCMS-2 0.27 LCMS-2 

18-Apr-07 1.69 LCMS-2 0.93 LCMS-2 

23-Apr-07 1.47 LCMS-2 0.93 LCMS-2 

30-Apr-07 2.04 LCMS-2 1.27 LCMS-2 

7-May-07 1.75 LCMS-2 1.05 LCMS-2 

14-May-07 1.70 LCMS-2 0.20 LCMS-2 

21-May-07 1.65 LCMS-2 0.88 LCMS-2 

29-May-07 1.74 LCMS-2 1.26 LCMS-2 

4-Jun-07 1.54 LCMS-2 0.83 LCMS-2 

11-Jun-07 1.58 LCMS-2 0.80 LCMS-2 

18-Jun-07 1.63 LCMS-2 1.00 LCMS-2 

25-Jun-07 1.60 LCMS-2 1.12 LCMS-2 

9-Jul-07 0.14 LCMS-2 0.03 LCMS-2* 

16-Jul-07 0.15 LCMS-2 0.03 LCMS-2* 

23-Jul-07 0.13 LCMS-2 0.08 LCMS-2 

30-Jul-07 0.15 LCMS-2 0.12 LCMS-2 

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13-Aug-07 0.12 LCMS-2 0.11 LCMS-2 

27-Aug-07 0.13 LCMS-2 0.06 LCMS-2 

10-Sep-07 0.15 LCMS-2 0.10 LCMS-2 

24-Sep-07 0.15 LCMS-2 0.09 LCMS-2 

16-Oct-07 0.16 LCMS-2 0.07 LCMS-2 

22-Oct-07 0.14 LCMS-2 0.12 LCMS-2 

5-Nov-07 0.12 LCMS-2 0.09 LCMS-2 

19-Nov-07 0.19 LCMS-2 0.14 LCMS-2 

3-Dec-07 0.14 LCMS-2 0.12 LCMS-2 

2-Jan-08 0.11 LCMS-2 0.11 LCMS-2 

14-Jan-08 0.17 LCMS-2 0.15 LCMS-2 

28-Jan-08 0.11 LCMS-2 0.09 LCMS-2 

11-Feb-08 0.10 LCMS-2 0.09 LCMS-2 

26-Feb-08 0.06 LCMS-2 0.03 LCMS-2* 

10-Mar-08 0.06 LCMS-2 0.06 LCMS-2 

24-Mar-08 0.07 LCMS-2 0.03 LCMS-2* 

7-Apr-08 0.06 LCMS-2 0.03 LCMS-2* 

14-Apr-08 0.03 LCMS-2* 0.03 LCMS-2* 

21-Apr-08 0.03 LCMS-2* 0.03 LCMS-2* 

28-Apr-08 0.03 LCMS-2* 0.03 LCMS-2* 

5-May-08 0.06 LCMS-2 0.03 LCMS-2* 

12-May-08 0.08 LCMS-2 0.06 LCMS-2 

19-May-08 0.03 LCMS-2* 0.03 LCMS-2* 

27-May-08 0.06 LCMS-2 0.07 LCMS-2 

2-Jun-08 0.06 LCMS-2 -

a - 

2-Jun-08 0.07 LCMS-2 -

a - 

9-Jun-08 0.08 LCMS-2 0.07 LCMS-2 

16-Jun-08 0.06 LCMS-2 0.03 LCMS-2* 

24-Jun-08 0.03 LCMS-2* 0.03 LCMS-2* 

30-Jun-08 0.07 LCMS-2 0.03 LCMS-2* 

7-Jul-08 0.07 LCMS-2 0.03 LCMS-2* 

14-Jul-08 0.06 LCMS-2 0.06 LCMS-2 

21-Jul-08 0.07 LCMS-2 0.06 LCMS-2 

28-Jul-08 0.06 LCMS-2 0.03 LCMS-2* 

11-Aug-08 0.06 LCMS-2 0.03 LCMS-2* 

25-Aug-08 0.06 LCMS-2 0.03 LCMS-2* 

8-Sep-08 0.03 LCMS-2* 0.03 LCMS-2* 

22-Sep-08 0.03 LCMS-2* 0.03 LCMS-2* 

6-Oct-08 0.03 LCMS-2* 0.03 LCMS-2* 

20-Oct-08 0.03 LCMS-2* 0.03 LCMS-2* 

3-Nov-08 0.03 LCMS-2* 0.03 LCMS-2* 

17-Nov-08 0.03 LCMS-2* 0.03 LCMS-2* 

1-Dec-08 0.03 LCMS-2* 0.03 LCMS-2* 

15-Dec-08 0.03 LCMS-2* 0.03 LCMS-2* 

29-Dec-08 0.03 LCMS-2* 0.03 LCMS-2* 

12-Jan-09 0.03 LCMS-2* 0.03 LCMS-2* 

26-Jan-09 0.03 LCMS-2* 0.03 LCMS-2* 

10-Feb-09 0.03 LCMS-2* 0.06 LCMS-2 

23-Feb-09 0.03 LCMS-2* 0.03 LCMS-2* 

9-Mar-09 0.03 LCMS-2* 0.03 LCMS-2* 

23-Mar-09 0.03 LCMS-2* 0.03 LCMS-2* 

6-Apr-09 0.03 LCMS-2* 0.03 LCMS-2* 

13-Apr-09 0.03 LCMS-2* 0.03 LCMS-2* 

20-Apr-09 0.03 LCMS-2* 0.03 LCMS-2* 

27-Apr-09 0.03 LCMS-2* 0.03 LCMS-2* 

4-May-09 0.03 LCMS-2* 0.03 LCMS-2* 

ResidueResults Page 2 of 3

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11-May-09 0.03 LCMS-2* 0.03 LCMS-2* 

18-May-09 0.16 LCMS-2 0.12 LCMS-2 

26-May-09 0.18 LCMS-2 0.15 LCMS-2 

1-Jun-09 0.18 LCMS-2 0.15 LCMS-2 

8-Jun-09 0.23 LCMS-2 0.16 LCMS-2 

15-Jun-09 1.37 LCMS-2 0.81 LCMS-2 

22-Jun-09 3.04 LCMS-2 2.77 LCMS-2 

29-Jun-09 2.46 LCMS-2 1.84 LCMS-2 

6-Jul-09 2.79 LCMS-2 2.14 LCMS-2 

13-Jul-09 2.62 LCMS-2 1.95 LCMS-2 

20-Jul-09 2.74 LCMS-2 1.73 LCMS-2 

27-Jul-09 2.40 LCMS-2 2.00 LCMS-2 

10-Aug-09 1.18 LCMS-2 1.10 LCMS-2 

24-Aug-09 2.43 LCMS-2 2.04 LCMS-2 

8-Sep-09 2.53 LCMS-2 1.75 LCMS-2 

21-Sep-09 2.05 LCMS-2 1.64 LCMS-2 

5-Oct-09 1.97 LCMS-2 1.70 LCMS-2 

20-Oct-09 1.36 LCMS-2 1.22 LCMS-2 

2-Nov-09 1.00 LCMS-2 1.04 LCMS-2 

23-Nov-09 0.92 LCMS-2 0.77 LCMS-2 

30-Nov-09 0.90 LCMS-2 0.76 LCMS-2 

14-Dec-09 0.93 LCMS-2 0.65 LCMS-2 

29-Dec-09 0.77 LCMS-2 0.67 LCMS-2 

11-Jan-10 0.80 LCMS-2 0.70 LCMS-2 

9-Feb-10 0.56 LCMS-2 0.55 LCMS-2 

22-Feb-10 0.37 LCMS-2 0.46 LCMS-2 

8-Mar-10 0.41 LCMS-2 0.42 LCMS-2 

22-Mar-10 0.49 LCMS-2 0.39 LCMS-2 

7-Apr-10 0.28 LCMS-3 0.26 LCMS-3 

10-Apr-10 0.27 LCMS-3 0.28 LCMS-3 

28-Apr-10 29.72 LCMS-3 23.57 LCMS-3 

3-May-10 28.88 LCMS-3 26.81 LCMS-3 

10-May-10 30.99 LCMS-3 29.57 LCMS-3 

17-May-10 30.67 LCMS-3 29.57 LCMS-3 

24-May-10 23.10 LCMS-3 27.44 LCMS-3 

1-Jun-10 0.13 LCMS-3 0.67 LCMS-3 

Avg. of Qtrly 

Means 1.67 1.46 

*Indicates a non-detection or residue below the method's Limit of Quantitation (LOQ). For purposes of charting and calculation,

1/2 the method LOQ was used. The Immunoassay (IA) atrazine LOQ was 0.10 ppb. The Gas Chromatographic/Mass Selective 

Detection method (GC/MS) LOQ was 0.1 ppb.The Liquid Chromatography / Mass Spectrometry / Mass Spectrometry (LC/MS) 

LOQ was typically 0.05-0.10 ppb. 

Montior Programs : 

Atrazine Monitoring Program 

Source type : 

Surface Water 

Ground Water 

Blended Water 

Not Available

a Sample result unavailable

The time-weighted (TW) period mean is an average of quarterly averages. 

Printed: 6/28/2010

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