| Chloride (mg/L Cl) : East Branch DuPage River average (EB1+EB2+EB3) | |||||||
| Test Date | EB1 | EB2 | EB3 | Average | |||
| 07/09/05 | 122.5 | 112.5 | 120.0 | 118.3 | |||
| 10/01/05 | 92.5 | 110.0 | 162.5 | 121.7 | |||
| 01/07/06 | 285.0 | 322.5 | 350.0 | 319.2 | |||
| 04/01/06 | 200.0 | 190.0 | 180.0 | 190.0 | |||
| 07/01/06 | 140.0 | 130.0 | 135.0 | 135.0 | |||
| 10/07/06 | 97.5 | 110.0 | 95.0 | 100.8 | |||
| 01/06/07 | 110.0 | 115.0 | 125.0 | 116.7 | |||
| 04/14/07 | 252.5 | 262.5 | 225.0 | 246.7 | |||
| 07/07/07 | 162.5 | 147.5 | 135.0 | 148.3 | |||
| 10/06/07 | 120.0 | 95.0 | 105.0 | 106.7 | |||
| 01/12/08 | 505.0 | 445.0 | 475.0 | 475.0 | |||
| Illinois EPA limit | 500.0 | ||||||
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