Mill and Dividing Creek Bacterial Monitoring 2012 Enterococci cfu/100 ml

  5/16* 5/23* 5/30* 6/6 6/13* 6/20 6/27 7/2 7/11 7/18 7/25 8/1 8/8 8/15
M1 340 420 4600 5 3460 82 240 956 1404 360 608 568 220 608
M2 140 5 1176 3 840 16 70 126 136 80 146 170 4 212
M3 24 3 36 1 62 2 18 46 80 50 40 38 4 6
D1 140 5 660 3 1620 40 188 832 900 450 368 712 132 336
D2 60 3 88 1 398 6 12 18 30 24 32 58 8 2
D3 8 1 42 1 50 14 6 42 42 24 26 34 2 8

*5/16:  approx. 0.7" of rain within 48 hours of sampling; 5/23: 0.8" of rain within 48 hours of sampling; 5/30: approx. 0.37" of rain within 12 hours of sampling; 6/13: 0.6" of rain within 48 hours of 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. 

Water samples are collected and analyzed by Sally Hornor and her students at Anne Arundel Community College. 

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.

Sally G. Hornor, Prof. of Microbiology, AACC Environmental Center  410 777 2842, sghornor@aacc.edu