As of April 2022 there were 805 state schools with Eco-Schools Green Flag accreditation, 387 of which had reached platinum status, for long term commitment to the programme.
Ym mis Ebrill 2022 roedd 805 o ysgolion gwladol gydag achrediad Baner Werdd Eco-Sgolion, gyda 387 ohonynt wedi cyrraedd statws platinwm, am ymrwymiad hirdymor i'r rhaglen.