Mill and Dividing Creek Bacterial Monitoring 2013 Enterococci cfu/100 ml

  5/22 5/29 6/5* 6/12* 6/19* 6/26 7/2* 7/10 7/17 7/24 7/31 8/7 8/14* 8/21
M1 8 448 2300 870 2700 350 360 440 580 1000 400 350 2840 40
M2 10 100 672 176 5335 494 560 60 44 312 100 80 3660 24
M3 1 40 228 548 1356 158 34 10 70 76 54 34 72 64
D1 24 320 1120 250 4040 1300 300 250 2760 980 570 960 5610 430
D2 1 56 96 16 1112 126 58 36 8 84 32 68 460 40
D3 4 22 108 16 320 50 62 34 10 32 58 42 52 28

*6/5: approx. 0.75" rain less than 48 hours before sampling; *6/12: approx. 1.2" of rain less than 48 hours before sampling; *6/19: approx. 1" of rain less than 24 hours before sampling; *7/2" approx. 0.4" of rain less than 48 hours before sampling; *8/14: approx.0.4" of rain within 24 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