DISSOLVED-OXYGEN REPORT REVIEW
Yenra | Updated September 8, 2026
Article: https://yenra.com/dissolved-oxygen/

PURPOSE
Interpret a hydropower dissolved-oxygen report and identify missing context. This is a desk-review record; use trained personnel and the approved site plan for measurements.

REPORT AND OBJECTIVE
Waterbody/site, report date and monitoring purpose:
Applicable criterion/project objective and current source:
Statistic required: minimum / average / other, with period:

MEASUREMENT CONTEXT
Station ID/map, location, depth and outflow relationship:
Timestamp/timezone, sampling interval and missing periods:
Discharge/flow, unit operation and aeration status:
DO concentration (mg/L), temperature and quality flags:
For saturation: barometric pressure and salinity/conductance:
Equilibrium value, calculation tool and valid input range:
Instrument/calibration/check record, fouling and corrections:

CALCULATION CHECK
Percent saturation = measured DO / equilibrium DO x 100.
Fictional example: 6 mg/L / 8 mg/L x 100 = 75%; 8 / 10 x 100 = 80%. Equilibrium values are invented, not real lookup results for a stated temperature. Report concentration and the actual supporting conditions together.

AERATION CLAIM
Comparison periods and matched flow/temperature conditions:
Repeated observations and downstream persistence:
Spatial/seasonal coverage and low-value periods:
Total dissolved-gas monitoring where relevant and its rationale:
How changes in operation or instruments were addressed:

CONCLUSION
What the observations support for the monitored reach/period:
Data gaps and their effect on interpretation:
Question / needed record / responsible party / requested date:
Avoid applying a universal DO threshold; use the criterion and statistic applicable to this waterbody and purpose.

REFERENCE CONTEXT
The linked article explains the comparisons and limits. Check exact project or equipment documents before using a specification.
dissolved-oxygen explanation
https://www.usgs.gov/water-science-school/science/dissolved-oxygen-and-water
DOTABLES
https://www.usgs.gov/tools/dotables
March 2026 report on total dissolved-gas monitoring below Youghiogheny Dam
https://pubs.usgs.gov/publication/ofr20261068/full