FOSC Coliform Data
Testing is done by the FOSC Water Quality Monitoring Field Team
See the: Map of Monitoring Sites
Measurements in colonies/100 mL
SUS = Suspended
PRE = Prior to the start of testing at this location
ND = No Data
TNTC= Too numerous to count
Testing is done at up to 12 sites monthly. Flora, Bennington, Wayne and Brashears Run are tributaries and/or stormwater outfalls; eight are main channel locations, including Blueridge Ave in Wheaton at the headwaters of Sligo Creek, and Jackson Ave, Central Ave, and 13th Ave (beginning in January 2022), all in Takoma Park.
Note: Use the scroll bar at the bottom of the table to bring the right-most columns into view.
Further note: Click on a field(s) in the Column Visibility button to suppress display of that field(s);
click the field(s) in the Column Visibility button again to redisplay in the table.
Date | Blueridge | Wheaton Lane | Dennis Ave | Flora Lane | Dallas Ave | Bennington Dr (SA10) | Wayne Ave | Fleetwood Terrace | Brashears Run | Jackson Ave | Central Ave (Long Branch) | 13th Ave | Maple Ave (KE01A) | Maple Ave (KE01B) | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | E.Coli | Total Coliform | |
2023-04 | 200 | 7300 | 100 | 500 | 1200 | TNTC | 200 | 1100 | 1100 | 150000 | 100 | 6400 | SUS | SUS | 500 | 1400 | 1700 | 5500 | 200 | 1100 | 200 | 900 | 0 | 900 | SUS | SUS | SUS | SUS |
2023-03 | 100 | 3300 | 100 | 500 | 0 | 0 | NA | NA | 0 | 100 | 100 | 6400 | SUS | SUS | 1500 | 1700 | 100 | 700 | 0 | 100 | 0 | 0 | 100 | 600 | SUS | SUS | SUS | SUS |
2023-02 | 0 | 300 | 0 | 100 | 0 | 100 | 0 | 0 | 0 | 100 | 200 | 8200 | 2200 | TNTC | 0 | 400 | 0 | 4100 | 200 | 300 | 0 | 0 | 100 | 100 | SUS | SUS | SUS | SUS |
2022-12 | 600 | 2900 | 0 | 200 | 0 | 200 | 0 | 1000 | 0 | 100 | 0 | 1000 | 8600 | 14200 | 1000 | 7100 | 0 | 3600 | 400 | 1100 | 0 | 400 | 0 | 300 | SUS | SUS | SUS | SUS |
2022-11 | 500 | 3500 | 100 | 800 | 200 | 900 | 200 | 700 | 0 | 1000 | 0 | 500 | TNTC | TNTC | TNTC | TNTC | 400 | 4400 | 400 | 3500 | 0 | 300 | 600 | 2600 | SUS | SUS | SUS | SUS |
2022-10 | ND | ND | ND | ND | ND | ND | ND | ND | 0 | 600 | 1800 | 10200 | 10800 | 14200 | 200 | 3400 | 700 | 7300 | 100 | 900 | 100 | 600 | 0 | 500 | SUS | SUS | SUS | SUS |
2022-09 | 100 | 5100 | 500 | 2600 | 300 | 2700 | 300 | 3400 | 300 | 5100 | 0 | 300 | TNTC | TNTC | 16000 | 18000 | ND | ND | ND | ND | NA | ND | ND | ND | SUS | SUS | SUS | SUS |
2022-08 | 1000 | 4900 | 200 | 1800 | 1500 | 7100 | 200 | 2400 | 0 | 3600 | 8800 | 11100 | TNTC | TNTC | 700 | 5100 | 200 | 5900 | 0 | 3200 | 100 | 2900 | 200 | 3400 | SUS | SUS | SUS | SUS |
2022-06 | 1600 | 5000 | 600 | 3700 | 700 | 3900 | 400 | 4100 | 200 | 2100 | 4000 | 11500 | 1400 | TNTC | 900 | 3500 | 0 | 300 | 100 | 2600 | 300 | 1200 | 200 | 1800 | SUS | SUS | SUS | SUS |
2022-04 | 100 | 2700 | ND | ND | 100 | 900 | 0 | 600 | 600 | 1500 | TNTC | TNTC | 1500 | 12200 | 2300 | TNTC | 100 | 1100 | 700 | TNTC | 200 | 500 | 0 | 1500 | SUS | SUS | SUS | SUS |
2022-02 | 100 | 5300 | 0 | 300 | 100 | 200 | 100 | 100 | 0 | 300 | 0 | 1000 | 800 | 1700 | 400 | 900 | 100 | 300 | 0 | 200 | 0 | 1400 | 0 | 400 | SUS | SUS | SUS | SUS |
2022-01 | 300 | 2900 | 100 | 1800 | 0 | 1500 | 200 | 2500 | 0 | 4300 | 200 | 900 | 3800 | 6400 | 400 | 900 | 5100 | 8000 | 700 | 3500 | 0 | 1300 | 0 | 1200 | SUS | SUS | SUS | SUS |
2021-12 | 4200 | TNTC | 400 | 3000 | 100 | 1200 | 0 | 500 | 0 | 300 | 100 | 3500 | 200 | TNTC | 1500 | 3400 | 400 | 5600 | ND | ND | 0 | 600 | SUS | SUS | SUS | SUS | ||
2021-09 | 2600 | 5800 | ND | ND | 200 | 3300 | 500 | 3500 | 200 | 2100 | 1700 | 4800 | 600 | 7400 | 100 | 2700 | 400 | 5700 | 200 | 1300 | 200 | 1100 | SUS | SUS | SUS | SUS | ||
2021-08 | PRE | PRE | 300 | 6300 | 300 | 4400 | 1200 | 5200 | 400 | 3300 | ND | ND | ND | ND | 200 | 2700 | 1300 | 5400 | PRE | PRE | 0 | 1000 | SUS | SUS | SUS | SUS | ||
2021-07 | PRE | PRE | 200 | 2000 | 400 | 1500 | 1800 | 2400 | 500 | 1300 | 0 | TNTC | 100 | 5500 | 300 | 2500 | 900 | 5400 | PRE | PRE | PRE | PRE | SUS | SUS | SUS | SUS | ||
2021-06 | PRE | PRE | 2300 | 7500 | 300 | 6400 | 100 | 6400 | 100 | 1800 | TNTC | TNTC | 14000 | 24000 | 800 | 6700 | PRE | PRE | PRE | PRE | PRE | PRE | SUS | SUS | SUS | SUS | ||
2021-04 | PRE | PRE | 100 | 5800 | 1900 | 9100 | 100 | 3200 | 0 | 1800 | 0 | 11300 | 500 | 20200 | 0 | 3500 | PRE | PRE | PRE | PRE | PRE | PRE | SUS | SUS | SUS | SUS | ||
2021-02 | PRE | PRE | 0 | 4600 | 200 | 5600 | 0 | 800 | 0 | 1300 | 600 | 5000 | 38000 | 44000 | 900 | 3000 | PRE | PRE | PRE | PRE | PRE | PRE | SUS | SUS | SUS | SUS | ||
2020-11 | PRE | PRE | 0 | 1800 | 0 | 1700 | 0 | 2800 | 300 | 1800 | 0 | 400 | 100000 | 100000 | 1000 | 2000 | SUS | SUS | SUS | SUS | ||||||||
2020-09 | PRE | PRE | 800 | 1700 | 200 | 1000 | 600 | 2000 | 0 | 700 | 400 | 900 | 3900 | 5500 | 800 | 1700 | SUS | SUS | SUS | SUS | ||||||||
2020-08 | PRE | PRE | ND | ND | ND | ND | ND | ND | ND | ND | 0 | 800 | 3600 | 4900 | 900 | 2600 | SUS | SUS | SUS | SUS | ||||||||
2020-07 | PRE | PRE | 0 | 3100 | 1200 | 2300 | 900 | 4100 | 500 | 1900 | ND | ND | ND | ND | ND | ND | SUS | SUS | SUS | US | ||||||||
2020-06 | PRE | PRE | ND | ND | 600 | 4700 | 400 | 4900 | 800 | 4000 | 0 | 2400 | 24000 | 31000 | 1100 | 5100 | SUS | SUS | SUS | SUS | ||||||||
2020-02 | PRE | PRE | 0 | 300 | 0 | 400 | 0 | 100 | 0 | 300 | 100 | 300 | 2600 | 2800 | 0 | 0 | SUS | SUS | SUS | SUS | ||||||||
2020-01 | PRE | PRE | 0 | 0 | 500 | 1000 | 0 | 400 | 0 | 400 | 2700 | 5200 | 4800 | 7300 | 100 | 300 | SUS | SUS | SUS | SUS | ||||||||
2019-12 | PRE | PRE | ND | ND | ND | ND | ND | ND | 0 | 200 | 0 | 200 | 3400 | 34000 | 1000 | 1400 | SUS | SUS | SUS | SUS | ||||||||
2019-11 | PRE | PRE | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | 300 | 1300 | SUS | SUS | SUS | SUS | |||||||||
2019-10 | PRE | PRE | 200 | 1000 | 200 | 2400 | 0 | 2100 | 0 | 400 | 400 | 8800 | 100000 | 100000 | 300 | 1300 | ND | ND | ND | ND | ||||||||
2019-09 | PRE | PRE | 200 | 600 | 300 | 1400 | 200 | 700 | 500 | 2100 | 0 | 4000 | 100000 | 100000 | 34000 | 35000 | 400 | 13000 | 2200 | 12700 | ||||||||
2019-05 | PRE | PRE | 500 | 700 | 400 | 1500 | 300 | 900 | 0 | 1500 | 200 | 9400 | 4300 | 7400 | 500 | 1900 | 200 | 700 | 100 | 300 | ||||||||
2019-02 | PRE | PRE | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | 6300 | 8400 | 1000 | 1500 | 300 | 400 | 200 | 200 | ||||||||
2018-11 | PRE | PRE | 100 | 500 | 200 | 700 | 100 | 300 | 300 | 900 | 0 | 28000 | 2400 | 24600 | 12400 | 13500 | 400 | 1900 | 0 | 200 | ||||||||
2018-10 | PRE | PRE | 100 | 500 | 100 | 300 | 300 | 900 | 24000 | 24000 | ND | ND | 12,000? | 12000 | ND | 1900 | ND | ND | ||||||||||
2018-08 | PRE | PRE | 300 | 1800 | 1700 | 4200 | 500 | 2000 | 200 | 2300 | 3000 | 19000 | 18000 | 20600 | 1900 | 5500 | 400 | 4500 | 300 | 2100 | ||||||||
2018-07 | PRE | PRE | 200 | 900 | 3x Wheaton | 1200 | 200 | 1600 | 400 | 1100 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ||||||||
2018-06 | PRE | PRE | 300 | 900 | 100 | 1200 | 900 | 2000 | 400 | 1100 | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ||||||||
2018-05 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | ND | ND | ND | ND | ND | ND | 800 | 2200 | 2200 | 2900 | ||||||||
2018-04 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1200 | 7000 | 100000 | 100000 | 800 | 3100 | ND | ND | ND | ND | ||||||||
2018-02 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1800 | 8600 | 26000 | 26900 | 1300 | 1800 | 7200 | 10600 | 1000 | 2200 | ||||||||
2017-12 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 2700 | 6200 | 22000 | 23700 | 1100 | 1100 | 1100 | 2200 | 0 | 0 | ||||||||
2017-11 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 900 | 1100 | 100000 | 100000 | 600 | 1500 | 14000 | 26000 | 1000 | 600 | ||||||||
2017-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 300 | 7000 | 13800 | 15900 | 1900 | 2300 | 1400 | 1900 | 100 | 400 | ||||||||
2017-06 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 3600 | 11900 | 18000 | 28000 | 2700 | 6900 | 2700 | 7100 | 1800 | 6700 | ||||||||
2017-04 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 0 | 0 | 32000 | 38000 | 2900 | 4600 | 500 | 7100 | 1500 | 6700 | ||||||||
2017-02 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 6300 | 6800 | 30000 | 30000 | 4200 | 4700 | 2700 | 3800 | 4200 | 5600 | ||||||||
2017-01 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1100 | 2000 | 100000 | 100000 | 600 | 1500 | 1600 | 5200 | 200 | 600 | ||||||||
2016-12 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | ND | ND | 100000 | 100000 | ND | 7300 | 0 | 0 | 0 | 0 | ||||||||
2016-11 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 500 | 900 | 100000 | 100000 | 5900 | 7300 | 3900 | 4800 | 200 | 300 | ||||||||
2016-10 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 600 | 7200 | 5100 | 16800 | 300 | 1800 | 1600 | 3000 | 1300 | 1700 | ||||||||
2016-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 700 | 3800 | 100000 | 100000 | 400 | 1200 | 6500 | 13200 | 100 | 400 | ||||||||
2016-08 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 400 | 8400 | 6200 | 11600 | PRE | ND | 1900 | 7900 | 0 | 2800 | ||||||||
2016-07 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 400 | 5700 | 9200 | 13400 | PRE | ND | 800 | 1400 | 100 | 900 | ||||||||
2016-06 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 2900 | 15000 | 100000 | 100000 | PRE | 2900 | 800 | 25000 | 600 | 2800 | ||||||||
2016-05 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1700 | 4400 | 900 | 9900 | PRE | 1700 | 4000 | 4300 | 500 | 3000 | ||||||||
2016-03 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 4000 | 9600 | 100000 | 100000 | PRE | 400 | 7500 | 8300 | 9100 | 10300 | ||||||||
2016-02 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 500 | 3600 | 24000 | 26000 | PRE | 500 | 11100 | 11900 | 5400 | 6200 | ||||||||
2015-12 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 400 | 1300 | 13100 | 15600 | PRE | 400 | 2100 | 4800 | 3400 | 3800 | ||||||||
2015-11 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 16000 | 20000 | 28000 | 100000 | PRE | 16000 | 12000 | 24000 | ND | ND | ||||||||
2015-10 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1000 | 6000 | 26000 | 100000 | PRE | 1000 | 300 | 6600 | 100 | 3900 | ||||||||
2015-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 200 | 6000 | ND | ND | PRE | PRE | 950 | 22000 | 100 | 5000 | ||||||||
2015-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 200 | 6000 | ND | ND | PRE | PRE | 950 | 22000 | 100 | 5000 | ||||||||