Synoptic Monitoring Event on July 15, 2025
for East Branch Delaware River under Base Flow conditions
Notes: "Delta Tox II Toxicity" refers to a test that checks how toxic a water sample is using a system called Delta Tox II. This system works by measuring how much light is produced by special glowing bacteria after they are exposed to the sample being tested. If the bacteria produce less light than expected, it means the sample may be toxic — the lower the light, the more harmful the sample is to the bacteria. On the other hand, if they produce more light, it might suggest the sample is stimulating the growth of the bacteria. So, in simple terms: A decrease in light = possible harm to the bacteria (toxicity); An increase in light = possible stimulation of the bacteria; East Branch Harvard (EBH)- Dissolved Oxygen sample rejected, sample had a large air bubble
East Branch Delaware River Monitoring Event Graph
This bar graph reports the raw data for each location that was sampled as part of the monitoring event conducted on this date. To view results for individual water quality indicators, click-off other indicators in the legend at the bottom of the graph.
Event Results
Scroll down to view the event results for each monitoring location.
| Location | Analyte | Value | Units | Remarks | Location |
|---|---|---|---|---|---|
|
East Branch Fishs Eddy (EBFE) |
Total Phosphorus (as P) | 21.3 | ug/L | Lab | |
| Temperature | 19.0 | C | Field | ||
| Specific Conductance | 51.1 | uS/cm | Lab | ||
| Nitrate-+Nitrite-Nitrogen (as N) | 0.27 | mg/L | Lab | ||
| Manganese | 0.0594 | mg/L | Lab | ||
| Iron | 0.476 | mg/L | Lab | ||
| Hydrogen Ion (pH) | 6.87 | Unitless (negative logarithm of H ion concentration) | Not Certifiable | Lab | |
| Dissolved Oxygen | 6.8 | mg/L | Not Certifiable; sample had small air bubble, sample accepted | Lab | |
| Delta Tox II Toxicity | 2.0 | % Light Change | Loss; Not Certifiable | Lab | |
| Chlorophyll | 3.14 | ug/L | Lab | ||
|
East Branch Harvard (EBH) |
Total Phosphorus (as P) | 7.91 | ug/L | Lab | |
| Temperature | 14.0 | C | Field | ||
| Specific Conductance | 63.7 | uS/cm | Lab | ||
| Nitrate-+Nitrite-Nitrogen (as N) | 0.26 | mg/L | Lab | ||
| Manganese | 0.0191 | mg/L | Lab | ||
| Iron | 0.095 | mg/L | Lab | ||
| Hydrogen Ion (pH) | 6.38 | Unitless (negative logarithm of H ion concentration) | Not Certifiable | Lab | |
| Delta Tox II Toxicity | 1.0 | % Light Change | Loss; Not Certifiable | Lab | |
| Chlorophyll | 1.54 | ug/L | Lab | ||
|
East Branch Downsville (EBD) |
Total Phosphorus (as P) | 2.75 | ug/L | Lab | |
| Temperature | 7.0 | C | Field | ||
| Specific Conductance | 66.6 | uS/cm | Lab | ||
| Nitrate-+Nitrite-Nitrogen (as N) | 0.19 | mg/L | Lab | ||
| Manganese | 0.0712 | mg/L | Lab | ||
| Iron | 0.025 | mg/L | non-detect | Lab | |
| Hydrogen Ion (pH) | 6.18 | Unitless (negative logarithm of H ion concentration) | Not Certifiable | Lab | |
| Dissolved Oxygen | 8.0 | mg/L | Not Certifiable | Lab | |
| Delta Tox II Toxicity | 2.0 | % Light Change | Loss; Not Certifiable | Lab | |
| Chlorophyll | 1.1 | ug/L | Lab |