Table 6.
Statistical summary of the MCLs for the commonly regulated pesticides.
| No. | Pesticide | CAS No. | MCL No. | Arithmetic Mean (mg/L) | Median (mg/L) | Geometric Mean (mg/L) | Pearson Coefficient | No. of MCLs in Data Clusters | % | Health Risk Uncertainty Bounds (mg/L) | No. of MCLs above Risk Upper Bound | % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2,4,5-TP | 93-72-1 | 138 | 0.088 | 0.009 | 0.0057 | 0.906 | 70 | 51% | (0.024, 0.37) | 1 | 1% |
| 2 | 2,4-D | 94-75-7 | 180 | 0.4 | 0.03 | 0.015 | 0.861 | 164 | 91% | (0.03, 0.47) | 6 | 3% |
| 3 | Alachlor | 15972-60-8 | 141 | 0.22 | 0.002 | 0.0066 | 0.952 | 123 | 87% | (0.03, 0.47) | 2 | 1% |
| 4 | Aldicarb | 116-06-3 | 103 | 0.1 | 0.004 | 0.0016 | 0.91 | 82 | 80% | (0.003, 0.047) | 2 | 2% |
| 5 | Aldrin | 309-00-2 | 110 | 0.003 | 0.00003 | 0.0000712 | 0.817 | 83 | 75% | (0.003, 0.047) | 1 | 1% |
| 6 | Atrazine | 1912-24-9 | 163 | 0.032 | 0.003 | 0.0027 | 0.948 | 130 | 80% | (0.015, 0.23) | 1 | 1% |
| 7 | Carbofuran | 1563-66-2 | 137 | 0.025 | 0.01 | 0.005 | 0.938 | 98 | 72% | (0.009, 0.14) | 0 | 0% |
| 8 | Chlordane | 57-74-9 or 12789-03-6 | 163 | 0.0067 | 0.0002 | 0.0005 | 0.939 | 137 | 84% | (0.0015, 0.023) | 8 | 5% |
| 9 | Chlorpyrifos | 2921-88-2 | 90 | 0.025 | 0.01 | 0.003 | 0.811 | 81 | 90% | (0.09, 1.4) | 0 | 0% |
| 10 | Dalapon | 75-99-0 | 104 | 0.26 | 0.2 | 0.014 | 0.872 | 89 | 86% | (0.09, 1.4) | 5 | 5% |
| 11 | DBCP | 96-12-8 | 125 | 0.013 | 0.00035 | 0.0002 | 0.909 | 112 | 90% | (0.0006, 0.0093) | 8 | 6% |
| 12 | DDT | 50-29-3 | 115 | 0.072 | 0.001 | 0.0011 | 0.945 | 82 | 71% | (0.006, 0.093) | 9 | 8% |
| 13 | Dieldrin | 60-57-1 | 141 | 0.003 | 0.00003 | 0.0000739 | 0.803 | 83 | 59% | (0.0003, 0.0047) | 9 | 6% |
| 14 | Dinoseb | 88-85-7 | 100 | 0.017 | 0.007 | 0.0017 | 0.878 | 91 | 91% | (0.003, 0.047) | 6 | 6% |
| 15 | Diquat | 85-00-7 | 115 | 0.019 | 0.02 | 0.0037 | 0.886 | 103 | 90% | (0.006, 0.093) | 1 | 1% |
| 16 | Endothall | C8H10O5 | 104 | 0.089 | 0.1 | 0.0089 | 0.855 | 98 | 94% | (0.09, 1.4) | 0 | 0% |
| 17 | Endrin | 72-20-8 | 136 | 0.0023 | 0.0006 | 0.0006 | 0.945 | 116 | 85% | (0.0006, 0.0093) | 4 | 3% |
| 18 | Glyphosate | 1071-83-6 | 122 | 1.04 | 0.7 | 0.042 | 0.864 | 91 | 75% | (0.9, 14) | 2 | 2% |
| 19 | Heptachlor | 76-44-8 | 137 | 0.0038 | 0.0003 | 0.0002 | 0.952 | 85 | 62% | (0.0015, 0.023) | 11 | 8% |
| 20 | Heptachlor Epoxide | 1024-57-3 | 120 | 0.003 | 0.0003 | 0.00013 | 0.921 | 93 | 78% | (0.000039, 0.00061) | 14 | 12% |
| 21 | Lindane | 58-89-9 | 167 | 0.064 | 0.0002 | 0.00076 | 0.935 | 145 | 87% | (0.009, 0.14) | 9 | 5% |
| 22 | MCPA | 94-74-6 | 94 | 0.041 | 0.02 | 0.015 | 0.948 | 80 | 85% | (0.03, 0.47) | 1 | 1% |
| 23 | Methoxychlor | 72-43-5 | 159 | 0.56 | 0.02 | 0.011 | 0.891 | 113 | 71% | (0.3, 4.67) | 4 | 3% |
| 24 | Oxamyl | 23135-22-0 | 104 | 0.11 | 0.2 | 0.0089 | 0.89 | 89 | 86% | (0.006, 0.093) | 55 | 53% |
| 25 | Pentachloropnenol | 87-86-5 | 153 | 0.081 | 0.001 | 0.0012 | 0.957 | 123 | 80% | (0.015, 0.23) | 4 | 3% |
| 26 | Picloram | 1918-02-1 | 119 | 0.98 | 0.3 | 0.031 | 0.871 | 103 | 87% | (0.21, 3.27) | 5 | 4% |
| 27 | Simazine | 122-34-9 | 157 | 0.15 | 0.004 | 0.002 | 0.936 | 148 | 94% | (0.015, 0.23) | 2 | 1% |
| 28 | Toxaphene | 8001-35-2 | 99 | 0.003 | 0.003 | 0.00072 | 0.881 | 90 | 91% | (0.006, 0.093) | 1 | 1% |
| 29 | Trifluralin | 1582-09-8 | 98 | 0.23 | 0.02 | 0.0039 | 0.907 | 78 | 80% | (0.06, 0.93) | 1 | 1% |