Criterion 1 | NSV=20 days and MP=66%
| Criterion 2| NSV=40 days and MP=50%
| NSV| longest continuos failure in year
| MP| minimum percentage of measurements per year
| A| number of active measurement sites
| Nx| number of stations meeting criterion x
| Vx| data capture, criterion x, in % (i.e. Nx/A*100)
| ČHMÚ| Czech Hydrometeorological Institute
| HS| Public Health Service
| VÚRV| Research Institute Plan Production
| ORG| ORGREZ
| LH| Forest Management (VÚLHM, VÚLHM-Opočno)
| KMon| municipal monitoring ( umperk, Břeclav, Olomouc, Vsetín, Hodonín, Zlín)
| Kwl| Kolowrat Forests
| MÚPu| Pardubice Municipal Athority
| MÚTř| Třinec Municipal Athority
| ČEZ| Chvaletice Power Plant, ČEZ Utility
| MÚPl| Plzeň Municipal Athority
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