Table 2.25 Chlorophyll a (mg/l) at the Lower Cape Fear River Program stations for the 2000-2001 monitoring period. The North Carolina state standard for chlorophyll a in freshwater and tidal salt water is 40 mg/l.
| DWQ# | 72 | 73 | 75 | 86 | 87 | 88 | 89 | 90 | 91 | 93 | DWQ# | 59 | 61 | 92 | 71 | 85 | 70 | 84 | ||||
| month | NAV | HB | BRR | M61 | M54 | M42 | M35 | M23 | M18 | SPD | month | NC11 | AC | DP | BBT | IC | NCF6 | B210 | NCF117 | |||
| JUN | 5.3 | 5.5 | 11.3 | 6.3 | 17.2 | 15.8 | 10.1 | 9.6 | 7.4 | 7.2 | JUN | 5.1 | 9.0 | 4.0 | 10.2 | 2.0 | 2.2 | 0.6 | 1.6 | |||
| JUL | 2.4 | 6.6 | 10.6 | 6.4 | 9.1 | 12.8 | 7.2 | 4.6 | 2.4 | 2.9 | JUL | 8.4 | 3.7 | 3.4 | 1.5 | 1.4 | 4.1 | 0.7 | 1.9 | |||
| AUG | 2.7 | 3.3 | 4.8 | 4.9 | 4.8 | 5.3 | 5.1 | 8.1 | 8.4 | 5.9 | AUG | 3.3 | 3.3 | 5.3 | 1.4 | 2.9 | 0.9 | 0.4 | 0.4 | |||
| SEP | 1.0 | 1.1 | 1.0 | 1.5 | 2.1 | 2.1 | 2.6 | 2.4 | 3.1 | 9.9 | SEP | 1.1 | 1.1 | 1.1 | 0.4 | 0.7 | 0.6 | 0.4 | 0.3 | |||
| OCT | 1.0 | 0.8 | 1.0 | 1.1 | 1.6 | 2.0 | 4.1 | 4.7 | 5.7 | 3.1 | OCT | 0.8 | 0.9 | 0.8 | 0.6 | 0.5 | 0.4 | 0.2 | 0.2 | |||
| NOV | 1.5 | 1.7 | 1.9 | 3.4 | 2.5 | 2.5 | 1.6 | 2.5 | 2.7 | 3.4 | NOV | 2.0 | 1.7 | 1.3 | 1.0 | 0.9 | 1.7 | 0.2 | 0.2 | |||
| DEC | 0.4 | 0.5 | 0.5 | 0.8 | 0.7 | 1.0 | 1.3 | 2.2 | 2.1 | 1.7 | DEC | 0.4 | 0.4 | 0.5 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | |||
| JAN | 2.7 | 2.4 | 2.3 | 2.3 | 2.8 | 4.1 | 3.5 | 3.0 | 3.1 | 3.7 | JAN | 2.7 | 2.3 | 1.6 | 1.7 | 2.0 | 1.2 | 2.1 | 1.0 | |||
| FEB | 4.8 | 4.5 | 3.5 | 2.3 | 2.4 | 2.8 | 4.0 | 7.0 | 8.2 | 6.4 | FEB | 14.9 | 10.4 | 7.5 | 6.0 | 4.3 | 2.1 | 0.9 | 0.8 | |||
| MAR | 2.8 | 1.9 | 2.6 | 2.4 | 2.6 | 2.5 | 4.6 | 6.1 | 6.8 | 4.7 | MAR | 4.2 | 2.6 | 2.1 | 1.4 | 1.3 | 0.7 | 0.7 | 0.4 | |||
| APR | 5.2 | 3.8 | 4.1 | 3.6 | 8.1 | 9.0 | 10.4 | 5.9 | 6.0 | 4.5 | APR | 4.5 | 4.3 | 4.9 | 3.8 | 4.1 | 1.1 | 2.5 | 1.1 | |||
| MAY | 3.4 | 5.4 | 5.4 | 3.6 | 5.6 | 6.1 | 3.3 | 4.0 | 3.1 | 3.9 | MAY | 15.2 | 13.6 | 8.5 | 8.7 | 7.1 | 7.3 | 2.0 | 1.4 | |||
| JUN | 2.5 | 2.0 | 3.0 | 2.7 | 5.6 | 18.2 | 9.7 | 6.3 | 7.2 | 5.9 | JUN | 6.6 | 5.7 | 5.9 | 4.3 | 6.5 | 2.0 | 0.7 | 1.6 | |||
| mean | 2.7 | 3.0 | 4.0 | 3.2 | 5.0 | 6.5 | 5.2 | 5.1 | 5.1 | 4.9 | mean | 5.3 | 4.5 | 3.6 | 3.2 | 2.6 | 1.9 | 0.9 | 0.9 | |||
| std dev | 1.5 | 1.9 | 3.3 | 1.7 | 4.3 | 5.5 | 3.0 | 2.2 | 2.3 | 2.1 | std dev | 4.7 | 3.9 | 2.5 | 3.1 | 2.2 | 1.8 | 0.7 | 0.6 | |||
| max | 5.3 | 6.6 | 11.3 | 6.4 | 17.2 | 18.2 | 10.4 | 9.6 | 8.4 | 9.9 | max | 15.2 | 13.6 | 8.5 | 10.2 | 7.1 | 7.3 | 2.5 | 1.9 | |||
| min | 0.4 | 0.5 | 0.5 | 0.8 | 0.7 | 1.0 | 1.3 | 2.2 | 2.1 | 1.7 | min | 0.4 | 0.4 | 0.5 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | |||
| DWQ# | 69.0 | 79.0 | 78.0 | 94.0 | 77.0 | 80.0 | 81.0 | 83.0 | 82.0 | DWQ# | 65.0 | 64.0 | 63.0 | 62.0 | 66.0 | 67.0 | 68.0 | All stations | ||||
| month | ANC | SAR | GS | NC403 | PB | LRC | ROC | BC117 | BCRR | month | 6RC | LCO | GCO | SR | BRN | HAM | COL | mean | ||||
| JUN | 2.7 | 0.8 | 3.2 | 8.5 | 6.0 | 0.7 | 0.4 | 0.8 | 205.7 | JUN | 0.3 | 1.4 | 0.7 | 8.6 | 2.2 | 0.8 | 0.6 | 11.0 | ||||
| JUL | 16.7 | 0.4 | 3.1 | 5.6 | 45.3 | 0.6 | 0.7 | 2.1 | 151.8 | JUL | 0.3 | 0.5 | 0.7 | 0.9 | 1.8 | 1.0 | 2.8 | 9.5 | ||||
| AUG | 1.3 | 0.9 | 1.8 | 5.6 | 5.4 | 3.8 | 1.0 | 0.6 | 5.3 | AUG | 0.6 | 1.2 | 1.1 | 1.7 | 0.8 | 0.7 | 1.0 | 3.1 | ||||
| SEP | 0.8 | 0.7 | 1.7 | 3.2 | 4.3 | 2.9 | 0.6 | 0.7 | 0.7 | SEP | 0.9 | 0.3 | 0.9 | 0.6 | 0.9 | 0.9 | 1.0 | 1.6 | ||||
| OCT | 1.9 | 0.2 | 0.8 | 4.5 | 2.1 | 0.8 | 0.1 | 0.4 | 0.7 | OCT | 0.1 | 1.0 | 0.9 | 0.6 | 0.8 | 0.2 | 0.2 | 1.3 | ||||
| NOV | 2.4 | 0.2 | 4.4 | 1.2 | 5.6 | 0.9 | 0.3 | 0.8 | 13.2 | NOV | 0.5 | 0.2 | 0.3 | 1.2 | 1.0 | 0.2 | 0.2 | 1.9 | ||||
| DEC | 0.3 | 0.3 | 0.6 | 0.4 | 0.7 | 1.2 | 1.5 | 0.6 | 0.8 | DEC | 0.5 | 0.5 | 0.7 | 0.7 | 1.0 | 0.4 | 0.2 | 0.7 | ||||
| JAN | 1.8 | 2.4 | 3.7 | 4.9 | 4.0 | 55.8 | 18.2 | 5.2 | 2.9 | JAN | 2.4 | 0.6 | 1.5 | 1.5 | 4.8 | 1.3 | 0.2 | 4.6 | ||||
| FEB | 1.2 | 1.3 | 2.1 | 5.7 | 3.4 | 28.3 | 9.5 | 5.8 | 1.1 | FEB | 1.5 | 2.2 | 0.8 | 2.4 | 2.2 | 3.9 | 0.3 | 4.8 | ||||
| MAR | 4.3 | 1.9 | 0.7 | 3.0 | 4.0 | 5.1 | 1.7 | 1.4 | 1.3 | MAR | 2.3 | 1.7 | 1.0 | 1.5 | 2.4 | 3.3 | 1.6 | 2.6 | ||||
| APR | 2.2 | 1.8 | 2.8 | 2.3 | 3.0 | 2.8 | 1.1 | 2.7 | 6.9 | APR | 1.1 | 2.8 | 1.1 | 1.9 | 1.0 | 1.4 | 1.7 | 3.6 | ||||
| MAY | 1.1 | 0.4 | 5.2 | 0.7 | 5.5 | 5.4 | 0.9 | 0.9 | 96.6 | MAY | 0.5 | 0.4 | 0.3 | 1.1 | 1.1 | 0.4 | 1.5 | 6.8 | ||||
| JUN | 2.0 | 1.1 | 3.4 | 2.4 | 6.7 | 7.1 | 2.2 | 0.8 | 2.2 | JUN | 0.8 | 1.2 | 1.5 | 1.9 | 0.5 | 1.5 | 1.0 | 3.9 | ||||
| mean | 3.0 | 1.0 | 2.6 | 3.7 | 7.4 | 8.9 | 2.9 | 1.8 | 37.6 | mean | 0.9 | 1.1 | 0.9 | 1.9 | 1.6 | 1.2 | 0.9 | 4.3 | ||||
| std dev | 4.1 | 0.7 | 1.4 | 2.3 | 11.1 | 15.3 | 5.0 | 1.7 | 66.0 | std dev | 0.7 | 0.8 | 0.4 | 2.0 | 1.1 | 1.1 | 0.8 | |||||
| max | 16.7 | 2.4 | 5.2 | 8.5 | 45.3 | 55.8 | 18.2 | 5.8 | 205.7 | max | 2.4 | 2.8 | 1.5 | 8.6 | 4.8 | 3.9 | 2.8 | 11.0 | ||||
| min | 0.3 | 0.2 | 0.6 | 0.4 | 0.7 | 0.6 | 0.1 | 0.4 | 0.7 | min | 0.1 | 0.2 | 0.3 | 0.6 | 0.5 | 0.2 | 0.2 | 0.7 |