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 | Wayne Ave (New Site) | 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 | E.Coli | Total Coliform | |||
2024-06 | 800 | 4600 | 400 | 3700 | 100 | 4100 | 100 | 2900 | 0 | 2900 | 1300 | 2200 | 500 | 4900 | 1100 | 4400 | 400 | 3100 | 200 | 2700 | 600 | 3900 | ||||||||||
2024-04 | 100 | 1500 | 100 | 400 | 0 | 100 | 200 | 1100 | 200 | 700 | 500 | 3100 | 12100 | 1400 | 12100 | 0 | 4300 | 100 | 4000 | 700 | 2400 | 100 | 500 | |||||||||
2024-03 | 4900 | 5800 | 0 | 500 | 0 | 100 | 300 | 1200 | 0 | 800 | 100 | 3900 | 300 | 5200 | 300 | 1900 | 0 | 1000 | 1200 | 4600 | 200 | 1800 | 0 | 800 | 100 | 700 | SUS | SUS | SUS | SUS | ||
2024-02 | 1600 | 1900 | 100 | 200 | 100 | 300 | 0 | 600 | 0 | 0 | 1600 | TNTC | 6400 | TNTC | 300 | 1900 | 0 | 1500 | 0 | 4700 | 0 | 100 | 0 | 100 | 200 | 500 | SUS | SUS | SUS | SUS | ||
2023-12 | 800 | 3200 | 100 | 1200 | 300 | 1300 | 100 | 1000 | 100 | 2000 | 0 | 0 | 2600 | 6200 | PRE | PRE | 100 | 4500 | 400 | 11200 | 300 | 2800 | 0 | 1000 | 500 | 3300 | SUS | SUS | SUS | SUS | ||
2023-11 | 200 | 4500 | 0 | 200 | 0 | 1400 | 0 | 1700 | 0 | 900 | 700 | 5800 | TNTC | TNTC | PRE | PRE | 1400 | 11600 | 500 | 6900 | 600 | 6500 | 0 | 4100 | 800 | 8400 | SUS | SUS | SUS | SUS | ||
2023-10 | 4300 | 10400 | 500 | 2000 | 0 | 900 | 100 | 1100 | 100 | 1000 | 1700 | 5000 | 700 | 2000 | PRE | PRE | 200 | 800 | 4500 | 4700 | 100 | 700 | 0 | 0 | 0 | 100 | SUS | SUS | SUS | SUS | ||
2023-08 | 3700 | 7200 | 300 | 1900 | 900 | 3200 | 100 | 1800 | 100 | 1800 | 800 | 2600 | TNTC | TNTC | PRE | PRE | 400 | 2600 | 200 | TNTC | 0 | 1400 | 0 | 1200 | 200 | 2100 | SUS | SUS | SUS | SUS | ||
2023-07 | 1500 | 5300 | 700 | 3900 | 300 | 3200 | 1100 | 5300 | 100 | 1800 | 1300 | 6500 | TNTC | TNTC | PRE | PRE | 200 | 2900 | 600 | 8600 | 100 | 2900 | 100 | 2400 | 300 | 1100 | SUS | SUS | SUS | SUS | ||
2023-06 | ND | ND | ND | ND | ND | ND | 800 | 2700 | ND | ND | TNTC | TNTC | TNTC | TNTC | PRE | PRE | 2200 | 900 | 700 | 10100 | 400 | 2800 | 0 | 700 | 200 | 2400 | SUS | SUS | SUS | SUS | ||
2023-04 | 200 | 7300 | 100 | 500 | 1200 | TNTC | 200 | 1100 | 1100 | 150000 | 100 | 6400 | SUS | SUS | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 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 | PRE | PRE | 1000 | 2000 | SUS | SUS | SUS | SUS | ||||||||||
2020-09 | PRE | PRE | 800 | 1700 | 200 | 1000 | 600 | 2000 | 0 | 700 | 400 | 900 | 3900 | 5500 | PRE | PRE | 800 | 1700 | SUS | SUS | SUS | SUS | ||||||||||
2020-08 | PRE | PRE | ND | ND | ND | ND | ND | ND | ND | ND | 0 | 800 | 3600 | 4900 | PRE | PRE | 900 | 2600 | SUS | SUS | SUS | SUS | ||||||||||
2020-07 | PRE | PRE | 0 | 3100 | 1200 | 2300 | 900 | 4100 | 500 | 1900 | ND | ND | ND | ND | PRE | PRE | ND | ND | SUS | SUS | SUS | SUS | ||||||||||
2020-06 | PRE | PRE | ND | ND | 600 | 4700 | 400 | 4900 | 800 | 4000 | 0 | 2400 | 24000 | 31000 | PRE | PRE | 1100 | 5100 | SUS | SUS | SUS | SUS | ||||||||||
2020-02 | PRE | PRE | 0 | 300 | 0 | 400 | 0 | 100 | 0 | 300 | 100 | 300 | 2600 | 2800 | PRE | PRE | 0 | 0 | SUS | SUS | SUS | SUS | ||||||||||
2020-01 | PRE | PRE | 0 | 0 | 500 | 1000 | 0 | 400 | 0 | 400 | 2700 | 5200 | 4800 | 7300 | PRE | PRE | 100 | 300 | SUS | SUS | SUS | SUS | ||||||||||
2019-12 | PRE | PRE | ND | ND | ND | ND | ND | ND | 0 | 200 | 0 | 200 | 3400 | 34000 | PRE | PRE | 1000 | 1400 | SUS | SUS | SUS | SUS | ||||||||||
2019-11 | PRE | PRE | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | PRE | PRE | 300 | 1300 | SUS | SUS | SUS | SUS | |||||||||||
2019-10 | PRE | PRE | 200 | 1000 | 200 | 2400 | 0 | 2100 | 0 | 400 | 400 | 8800 | 100000 | 100000 | PRE | PRE | 300 | 1300 | ND | ND | ND | ND | ||||||||||
2019-09 | PRE | PRE | 200 | 600 | 300 | 1400 | 200 | 700 | 500 | 2100 | 0 | 4000 | 100000 | 100000 | PRE | PRE | 34000 | 35000 | 400 | 13000 | 2200 | 12700 | ||||||||||
2019-05 | PRE | PRE | 500 | 700 | 400 | 1500 | 300 | 900 | 0 | 1500 | 200 | 9400 | 4300 | 7400 | PRE | PRE | 500 | 1900 | 200 | 700 | 100 | 300 | ||||||||||
2019-02 | PRE | PRE | ND | ND | ND | ND | ND | ND | ND | ND | ND | ND | 6300 | 8400 | PRE | PRE | 1000 | 1500 | 300 | 400 | 200 | 200 | ||||||||||
2018-11 | PRE | PRE | 100 | 500 | 200 | 700 | 100 | 300 | 300 | 900 | 0 | 28000 | 2400 | 24600 | PRE | PRE | 12400 | 13500 | 400 | 1900 | 0 | 200 | ||||||||||
2018-10 | PRE | PRE | 100 | 500 | 100 | 300 | 300 | 900 | 24000 | 24000 | ND | ND | PRE | PRE | 12,000? | 12000 | ND | 1900 | ND | ND | ||||||||||||
2018-08 | PRE | PRE | 300 | 1800 | 1700 | 4200 | 500 | 2000 | 200 | 2300 | 3000 | 19000 | 18000 | 20600 | PRE | PRE | 1900 | 5500 | 400 | 4500 | 300 | 2100 | ||||||||||
2018-07 | PRE | PRE | 200 | 900 | 3x Wheaton | 1200 | 200 | 1600 | 400 | 1100 | ND | ND | ND | ND | PRE | PRE | ND | ND | ND | ND | ND | ND | ||||||||||
2018-06 | PRE | PRE | 300 | 900 | 100 | 1200 | 900 | 2000 | 400 | 1100 | ND | ND | ND | ND | PRE | PRE | ND | ND | ND | ND | ND | ND | ||||||||||
2018-05 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | ND | ND | ND | ND | PRE | PRE | ND | ND | 800 | 2200 | 2200 | 2900 | ||||||||||
2018-04 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1200 | 7000 | 100000 | 100000 | PRE | PRE | 800 | 3100 | ND | ND | ND | ND | ||||||||||
2018-02 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1800 | 8600 | 26000 | 26900 | PRE | PRE | 1300 | 1800 | 7200 | 10600 | 1000 | 2200 | ||||||||||
2017-12 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 2700 | 6200 | 22000 | 23700 | PRE | PRE | 1100 | 1100 | 1100 | 2200 | 0 | 0 | ||||||||||
2017-11 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 900 | 1100 | 100000 | 100000 | PRE | PRE | 600 | 1500 | 14000 | 26000 | 1000 | 600 | ||||||||||
2017-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 300 | 7000 | 13800 | 15900 | PRE | PRE | 1900 | 2300 | 1400 | 1900 | 100 | 400 | ||||||||||
2017-06 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 3600 | 11900 | 18000 | 28000 | PRE | PRE | 2700 | 6900 | 2700 | 7100 | 1800 | 6700 | ||||||||||
2017-04 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 0 | 0 | 32000 | 38000 | PRE | PRE | 2900 | 4600 | 500 | 7100 | 1500 | 6700 | ||||||||||
2017-02 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 6300 | 6800 | 30000 | 30000 | PRE | PRE | 4200 | 4700 | 2700 | 3800 | 4200 | 5600 | ||||||||||
2017-01 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1100 | 2000 | 100000 | 100000 | PRE | PRE | 600 | 1500 | 1600 | 5200 | 200 | 600 | ||||||||||
2016-12 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | ND | ND | 100000 | 100000 | PRE | PRE | ND | 7300 | 0 | 0 | 0 | 0 | ||||||||||
2016-11 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 500 | 900 | 100000 | 100000 | PRE | PRE | 5900 | 7300 | 3900 | 4800 | 200 | 300 | ||||||||||
2016-10 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 600 | 7200 | 5100 | 16800 | PRE | PRE | 300 | 1800 | 1600 | 3000 | 1300 | 1700 | ||||||||||
2016-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 700 | 3800 | 100000 | 100000 | PRE | PRE | 400 | 1200 | 6500 | 13200 | 100 | 400 | ||||||||||
2016-08 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 400 | 8400 | 6200 | 11600 | PRE | PRE | PRE | ND | 1900 | 7900 | 0 | 2800 | ||||||||||
2016-07 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 400 | 5700 | 9200 | 13400 | PRE | PRE | PRE | ND | 800 | 1400 | 100 | 900 | ||||||||||
2016-06 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 2900 | 15000 | 100000 | 100000 | PRE | PRE | PRE | 2900 | 800 | 25000 | 600 | 2800 | ||||||||||
2016-05 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1700 | 4400 | 900 | 9900 | PRE | PRE | PRE | 1700 | 4000 | 4300 | 500 | 3000 | ||||||||||
2016-03 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 4000 | 9600 | 100000 | 100000 | PRE | PRE | PRE | 400 | 7500 | 8300 | 9100 | 10300 | ||||||||||
2016-02 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 500 | 3600 | 24000 | 26000 | PRE | PRE | PRE | 500 | 11100 | 11900 | 5400 | 6200 | ||||||||||
2015-12 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 400 | 1300 | 13100 | 15600 | PRE | PRE | PRE | 400 | 2100 | 4800 | 3400 | 3800 | ||||||||||
2015-11 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 16000 | 20000 | 28000 | 100000 | PRE | PRE | PRE | 16000 | 12000 | 24000 | ND | ND | ||||||||||
2015-10 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 1000 | 6000 | 26000 | 100000 | PRE | PRE | PRE | 1000 | 300 | 6600 | 100 | 3900 | ||||||||||
2015-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 200 | 6000 | ND | ND | PRE | PRE | PRE | PRE | 950 | 22000 | 100 | 5000 | ||||||||||
2015-09 | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | PRE | 200 | 6000 | ND | ND | PRE | PRE | PRE | PRE | 950 | 22000 | 100 | 5000 | ||||||||||