Assessment units are defined by HELCOM comtracting parties. An assessment units can have multiple indicators. Each indicator can have different temporal (months) and spatial (depths) coverage and reference values within the different assessment units.
- Dissolved Inorganic Nitrogen (DIN)
- Dissolved Inorganic Phosphorus (DIP)
- Chlorophyll a
- Secchi Depth
- Oxygen Debt
- Total Nitrogen (TN)
- Total Phosphorus (TP)
- Cyanobacteria Bloom Index (CyaBI)
- ES = Eutrophication Status
- ES_SD = Standard Deviation
- ES_N = Number of Observations
- ES_N_Min = Minimum Number of Observations any given year
- ES_SE = Standards Error
- ES_CI = Confidense Interval
- ET = Eutrophication Target / Threshold
- ER = Eutrophication Ratio
- ACDEV = Acceptable Deviation
- BEST = ET / (1 + ACDEV / 100)
- EQR = Ecological Quality Ratio
- EQR_HG = Ecological Quality Ratio High/Good Boundary
- EQR_GM = Ecological Quality Ratio Good/Moderate Boundary
- EQR_MP = Ecological Quality Ratio Moderate/Poor Boundary
- EQR_PB = Ecological Quality Ratio Poor/Bad Boundary
- EQRS = Ecological Quality Ratio Scaled
- GTC = General Temporal Confidence
- STC = Specific Temporal Confindence
- TTC = Total Temporal Confidence
- GSC = General Spatial Confidence
- SSC = Specific Spatial Confidence
- TSC = Total Spatial Confidence
- TC = Total Confidence