| Lake Lanier Water Quality Trend Monitoring | ||||||||
| Station 4 - Chattahoochee River | ||||||||
| Field Measurements | ||||||||
| Air | Water | Conduct. | Cond @25°C | |||||
| Sample Date | Time | Temp °C | Temp °C | pH | micromhos/cm | micromhos/cm | D.O. mg/l | |
| 07/14/99 | 1230 | 29 | 21 | 7.91 | 33 | 35 | 8.9 | |
| 07/28/99 | 0925 | 26 | 27 | 7.07 | 39 | 36 | 7.9 | |
| 08/08/99 | 0940 | 27 | 27 | 7.22 | 47 | 45 | 8.5 | |
| 08/19/99 | 1430 | 35 | 30 | 7.04 | 42 | 37 | 8.2 | |
| 09/06/99 | 0935 | 25 | 24 | 7.02 | 47 | 47 | 8.1 | |
| 09/25/99 | 1155 | 25 | 19 | 7.04 | 48 | 53 | 8.3 | |
| 10/14/99 | 1402 | 26 | 19 | 7.10 | 39 | 44 | 8.3 | |
| 10/31/99 | 0947 | 21 | 14 | 7.12 | 36 | 43 | 9.5 | |
| 11/11/99 | 1005 | 19 | 13 | 7.21 | 33 | 41 | 9.3 | |
| 11/28/99 | 1328 | 21 | 12 | 7.14 | 27 | 36 | 11.6 | |
| 12/15/99 | 1755 | 10 | 9 | 7.26 | 26 | 35 | 12.3 | |
| 12/26/99 | 1305 | 14 | 4 | 7.39 | 20 | 34 | 8.6 | |
| 01/15/00 | 1332 | 12 | 6 | 6.96 | 23 | 35 | 11.9 | |
| 01/27/00 | 1255 | 4 | 2 | 7.00 | 21 | 37 | 13.2 | |
| 02/13/00 | 1315 | 5 | 9 | 6.83 | 26 | 37 | 11.3 | |
| 02/24/00 | 1115 | 18 | 10 | 7.06 | 27 | 37 | 10.7 | |
| 03/09/00 | 0955 | 20 | 13 | 6.88 | 30 | 38 | 10.2 | |
| 03/27/00 | 0930 | 16 | 14 | 6.61 | 26 | 31 | 9.2 | |
| 04/11/00 | 1330 | 26 | 14 | 6.86 | 24 | 30 | 10.0 | |
| 04/27/00 | 1521 | 25 | 15 | 6.78 | 26 | 30 | 9.7 | |
| 05/12/00 | 1033 | 28 | 22 | 6.90 | 34 | 35 | 7.9 | |
| 05/18/00 | 1058 | 27 | 20 | 6.81 | 34 | 36 | 8.4 | |
| 06/01/00 | 1240 | 32 | 25 | 7.17 | 34 | 34 | 8.0 | |
| 06/16/00 | 1042 | 31 | 26 | 7.08 | 40 | 39 | 7.2 | |
| Station 4 - Chattahoochee River | Lab Measurements | |||||||
| Fecal col. | BOD5 | TSS | Hardness | Alkalinity | COD | |||
| Sample Date | cfb/100ml | mg/l | mg/l | Turb NTU | mg/l CaCO3 | mg/l CaCO3 | mg/l | |
| 07/14/99 | 950 | 1.2 | 12.7 | 17.0 | 15 | 11 | 4.2 | |
| 07/28/99 | 300 | 1.0 | 10.8 | 10.0 | 24 | 11 | 9.7 | |
| 08/08/99 | 100 | 0.3 | 7.8 | 6.3 | 22 | 13 | 15.4 | |
| 08/19/99 | 20 | 0.9 | 10.2 | 9.0 | 24 | 13 | 15.4 | |
| 09/06/99 | 140 | 1.5 | 13.8 | 8.5 | 32 | 14 | 6.7 | |
| 09/25/99 | 90 | 0.5 | 10.8 | 12.0 | 42 | 15 | 6.7 | |
| 10/14/99 | 1590 | 2.0 | 17.4 | 21.0 | 34 | 12 | 10.0 | |
| 10/31/99 | 140 | 1.3 | 2.6 | 4.3 | 34 | 13 | 0.0 | |
| 11/11/99 | 60 | 2.5 | 3.4 | 5.0 | 34 | 14 | 4.0 | |
| 11/28/99 | 2340 | 1.3 | 19.6 | 17.0 | 38 | 11 | 6.0 | |
| 12/15/99 | 1080 | 2.3 | 11.8 | 12.0 | 38 | 11 | 5.0 | |
| 12/26/99 | 0 | 1.9 | 1.8 | 3.3 | 40 | 12 | 0.0 | |
| 01/15/00 | 100 | 1.1 | 4.0 | 7.6 | 26 | 11 | 6.2 | |
| 01/27/00 | 150 | 0.9 | 2.0 | 4.6 | 30 | 11 | 2.1 | |
| 02/13/00 | 240 | 1.2 | 4.4 | 4.5 | 28 | 13 | 8.3 | |
| 02/24/00 | 0 | 1.4 | 2.6 | 4.1 | 30 | 11 | 2.1 | |
| 03/09/00 | 150 | 0.8 | 3.0 | 4.0 | 30 | 12 | 3.9 | |
| 03/27/00 | 150 | 1.3 | 5.6 | 6.4 | 24 | 11 | 3.9 | |
| 04/11/00 | 200 | 1.5 | 4.4 | 6.1 | 28 | 9 | 3.9 | |
| 04/27/00 | 20 | 0.7 | 3.0 | 4.6 | 26 | 10 | 2.0 | |
| 05/12/00 | 130 | 1.0 | 3.8 | 4.5 | 28 | 11 | 3.5 | |
| 05/18/00 | 60 | 1.0 | 7.2 | 6.9 | 24 | 12 | 1.8 | |
| 06/01/00 | 10 | 1.4 | 3.6 | 4.6 | 28 | 11 | 5.3 | |
| 06/16/00 | 1320 | 1.2 | 11.4 | 16.0 | 28 | 11 | 3.5 | |
| NO2+NO3 | NH4 | Tot N | Tot P | |||||
| Sample Date | mg/l | mg/l | mg/l | mg/l | ||||
| 07/14/99 | 0.4893 | 0.0390 | 1.1486 | 0.0370 | ||||
| 08/08/99 | 0.3724 | 0.0482 | 0.9443 | 0.0266 | ||||
| 09/06/99 | 0.4677 | 0.0543 | 1.1495 | 0.0584 | ||||
| 10/14/99 | 0.3401 | 0.0697 | 0.9899 | 0.0929 | ||||
| 11/11/99 | 0.4568 | 0.0281 | 0.7779 | 0.0258 | ||||
| 12/15/99 | 0.5821 | 0.0434 | 1.1723 | 0.0586 | ||||
| 01/15/00 | 0.7177 | 0.0338 | 1.0506 | 0.0328 | ||||
| 02/13/00 | 0.7087 | 0.0389 | 0.8801 | 0.0233 | ||||
| 03/09/00 | 0.6123 | 0.0184 | 0.7723 | 0.0335 | ||||
| 04/11/00 | 0.5787 | 0.0103 | 0.7620 | 0.0186 | ||||
| 05/12/00 | 0.4796 | 0.0216 | 0.6776 | 0.0250 | ||||
| 06/01/00 | 0.4944 | 0.0248 | 0.6645 | 0.0288 |