Mill and Dividing Creek Bacterial Monitoring 2015 Enterococci cfu/100 ml

  5/20* 5/27 6/3** 6/10+ 6/17 6/24^ 7/1^^ 7/8 7/15 7/22 7/29 8/5 ~8/12 8/19
M1 2200 130 6100 1120 1450 6400 18500 150 1040 430 560 220 1600 1
M2 840 600 8240 240 36 8600 6500 87 400 40 276 68 500 24
M3 220 36 3270 120 38 7420 12900 12 28 1 6 26 150 6
D1 480 210 3720 320 240 8050 9800 460 710 64 728 10 5300 510
D2 150 136 990 90 20 9640 9550 28 8 2 28 36 450 1
D3 100 32 300 10 24 2730 6180 6 16 1 6 8 320  18

*Rain of approximately 1.7inches fell within 30 hours of sampling.  It is recommended to stay out of the water for 48 hours after a rain event.

** Approximately 2" of rain fell within 48 hours prior to sampling.

+ About 1.5" of rain fell approximately 30 hours prior to testing.

^ Approximately 1.2 - 1.7" of rain fell within 14 hours prior to  sampling.

^^ Up to 1.2" of rain fell the evening prior to sampling.

~ Approximately 0.46" of rain fell within 48 hrs prior to sampling

Enterococci are bacteria that are found in the GI tract of warm-blooded animals, which includes all birds and mammals.  Their presence in surface water indicates recent contamination with fecal waste.  Counts are expressed as cfu or colony-forming units.  Counts greater than 104/100 ml are shown in red as they indicate that water is not suitable for recreational use. 

This work is funded by Anne Arundel County Dept. of Public Works.

 

 M1 and D1 are the furthest upstream tidal stations in Mill and Dividing Creeks while M3 and D3 are the furthest downstream stations.  Results are now posted on a larger map, click here for the map. 

These data may not be used in another publication without written permission of Sally Hornor.