Enterococci Results for Mill and Dividing Creeks

Summer 2008

All results are shown as Enterococci/100ml

Station	5/22	5/28	6/4*	6/11	6/18	6/25	7/2	7/9	7/16	7/23	7/30	8/6	8/13	8/20
M1	340	780	15300	1480	1940	580	1800	140	1340	1600	1920	1700	1800	200
M2	20	300	4000	5800	200	120	100	9	400	150	588	320	190	110
M3	20	8	1000	40	40	10	9	3	3	8	8	32	4	4
D1	50	70	1360	500	160	20	310	90	180	200	570	550	60	30
D2	12	28	1080	20	16	30	10	8	3	3	4	8	8	3
D3	3	40	220	400	28	10	9	3	3	8	3	28	3	3
M6	100	170	2580	450	520	1080	390	5	150	540	430	420	220	100
M7	40	110	1980	350	140	1000	1470	10	50	390	260	230	150	50

*6/4: 0.94” of rain within 24 hours of sampling. On 6/5, 2,477 gallons of sewage were released into Mill Creek from the Haskell Dr. pumping station, which is across the creek from M2.

The level considered “safe” for swimming is less than 105 enterococci/100 ml; counts exceeding this value are shown in red.

Water samples are being collected and analyzed by Sally Hornor at Anne Arundel Community College at the request of the Mill Creek Scientific Review Committee to allow continued monitoring of bacterial trends in Mill and Dividing Creeks.  This project is funded by Anne Arundel County Dept. of Public Works.

Maps of these stations are now available, courtesy of BayLand Consultants and Designers Inc: a map of Mill and Dividing Creek watersheds showing sampling locations, a close-up version of this map showing only the tidal stations, and a map showing the location of M6 and M7 in relation to the tidal stations is available here. All stations are the same as previously sampled during the course of this study. M1 and D1 are the furthest upstream tidal stations in Mill and Dividing Creeks while M3 and D3 are the furthest downstream stations. M7 is just upstream of the Mill Creek pumping station while M6 is just downstream.

Sally Hornor, Ph. D.

Professor of Microbiology

AACC Environmental Center

410 777 2842

sghornor@aacc.edu