Fig. 7From: Quality control in public participation assessments of water quality: the OPAL Water SurveyPond health scores for the two multiple-survey ponds. Pond health scores for a Marney’s Pond and b Weston Green Pond as recorded by more than 80 school children on 6th July 2010. Red, orange and green bars denote ‘poor’, ‘medium’ and ‘high’ water quality respectively, as defined in the OPAL Water SurveyBack to article page