County Total quarries Active quarries % of active quarries Affected Area by quarries (ha) Current Highland Grassland Area (ha) % of grassland loss by quarry activity
Olavarría 63 28 44 3124 5698 35.4
Benito Juárez 16 5 31 1522 10777 12.4
Azul 11 8 72 818 12679 6.1
General Pueyrredón 18 11 61 362 7670 4.5
Necochea 5 3 60 21 1902 1.1
Tandil 31 6 19 394 41995 0.9
Lobería 12 8 67 110 13971 0.8
Balcarce 3 2 67 77 21889 0.3
Total 158 71 45 6428 116581 5.2