WSSC Water Quality Monitoring
Here is the sping 2013 round of results of WSSC's fecal bacteria monitoring tests which are required by the consent decree. Many sites had high Enterococci bacteria counts this time. These results are from this WSSC report.
March 28, 2013 |
The Maryland state standards for Enterococci bacteria:
|
| Stream Site | Fecal Bacteria Results Enterococcus CFU/100mL | Bacterial Source Testing | ||||||
|---|---|---|---|---|---|---|---|---|
| Human | Avian | Canine | Deer | Horse | Miscellaneous Wildlife | Non-human Unknown | ||
| 1). Broad Creek (downstream - Henson Creek) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Cabin John Creek (upstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Horsepen (upstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Indian Creek (downstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Indian Creek (upstream) |
<10 (<10) | Human Bacteriodes HF183: Too few bacteria for HF183 (Too few bacteria for HF183) |
Box-PCR Source Determination: Too few bacteria for BOX-PCR (Too few bacteria for BOX-PCR) | |||||
| 1). Muddy Branch (downstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Muddy Branch (upstream) |
<10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Oxon Run (downstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Paint Branch (downstream) |
<10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Paint Branch (upstream) |
<10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Piscataway (upstream) |
<10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Rock Creek (upstream) |
<10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Seneca Creek (downstream) |
<10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Seneca Creek (upstream) | <10 | Human Bacteriodes HF183: Too few bacteria for HF183 | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Upper Beaverdam Creek (downstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 1). Watts Branch (downstream) |
<10 | Human Bacteriodes HF183: Negative | Box-PCR Source Determination: Too few bacteria for BOX-PCR | |||||
| 17). Upper Beaverdam Creek (upstream) |
13 | Human Bacteriodes HF183: Positive 6% | 29% | 8% | 10% | 0% | 21% | 26% |
| 18). Northwest Branch (upstream) |
15 | Human Bacteriodes HF183: Positive 9% | 35% | 8% | 9% | 0% | 26% | 13% |
| 19). Northeast Branch (upstream) |
18 | Human Bacteriodes HF183: Negative 0% | 36% | 7% | 11% | 0% | 28% | 18% |
| 19). Piscataway (downstream) |
18 (33) | Human Bacteriodes HF183: Negative (Negative) 0% (0%) | 38% (39%) | 10% (11%) | 9% (9%) | 0% (0) |
23% 22% | 20% (19%) |
| 19). Sligo Creek (upstream) |
18 | Human Bacteriodes HF183: Negative 3% | 37% | 13% | 11% | 0% | 23% | 13% |
| 22). Parkway (downstream - Bear Branch) |
20 | Human Bacteriodes HF183: Negative 5% | 37% | 9% | 12% | 0% | 22% | 15% |
| 23). Cabin John Creek (downstream) |
22 | Human Bacteriodes HF183: Negative 2% | 36% | 9% | 13% | 0% | 23% | 17% |
| 24). Watts Branch (upstream) |
23 | Human Bacteriodes HF183: Positive 7% | 36% | 6% | 13% | 0% | 18% | 20% |
| 25). Sligo Creek (downstream) |
31 | Human Bacteriodes HF183: Positive 11% | 31% | 16% | 9% | 0% | 21% | 12% |
| 25). Western Branch (upstream) |
31 | Human Bacteriodes HF183: Positive 11% | 39% | 7% | 10% | 0% | 23% | 10% |
| 27). Western Branch (downstream) |
35 | Human Bacteriodes HF183: Positive 9% | 41% | 9% | 11% | 0% | 17% | 13% |
| 29). Parkway (upstream - Walker Branch) |
37 | Human Bacteriodes HF183: Positive 8% | 33% | 12% | 8% | 0% | 23% | 16% |
| 30). Oxon Run (upstream - Watts Branch) |
40 | Human Bacteriodes HF183: Positive 7% | 41% | 13% | 9% | 0% | 11% | 19% |
| 31). Broad Creek (upstream - Henson Creek) |
42 | Human Bacteriodes HF183: Negative 0% | 39% | 6% | 8% | 0% | 26% | 21% |
| 32). Rock Creek (downstream) |
45 | Human Bacteriodes HF183: Positive 9% | 34% | 13% | 9% | 5% | 13% | 16% |
| 33). Horsepen (downstream) |
53 | Human Bacteriodes HF183: Negative 3% | 40% | 6% | 9% | 13% | 17% | 12% |
| 34). Northeast Branch (downstream) |
57 | Human Bacteriodes HF183: Positive 7% | 30% | 8% | 12% | 0% | 26% | 17% |
| 35). Lower Beaverdam Creek (upstream) | 81 | Human Bacteriodes HF183: Positive 9% | 38% | 5% | 9% | 0% | 22% | 17% |
| 36). Lower Beaverdam Creek (downstream) |
183 (210) | Human Bacteriodes HF183: Positive (Positive) 13% (14%) | 43% (41%) | 8% (9%) | 7% (7%) | 0% (0) |
15% 16% | 14% (13%) |
| 37). Little Falls (downstream) |
215 | Human Bacteriodes HF183: Positive 17% | 39% | 6% | 9% | 0% | 18% | 11% |
| 38). Lower Anacostia (downstream) |
462 | Human Bacteriodes HF183: Positive 9% | 41% | 13% | 6% | 0% | 16% | 15% |
| 39). Lower Anacostia (upstream) |
1077 | Human Bacteriodes HF183: Positive 16% | 43% | 11% | 3% | 0% | 15% | 12% |
| 40). Northwest Branch (downstream) |
2725 | Human Bacteriodes HF183: Positive 19% | 29% | 6% | 14% | 0% | 21% | 11% |
Numbers in parentheses() are results for field duplicate samples.
As part of continuing re-evaluation of the Water Quality Monitoring Plan and of the methodologies used, the Virginia Tech laboratory that provides the bacterial source tracking (BST) testing services now conducts a verification test for human bacterial sources using a library - independent analytical method (Human Bacteroides HF183) on all samples.