Pa gamau y mae Llywodraeth Cymru yn eu cymryd i sicrhau bod cwmnïau'n cael eu dwyn i gyfrif am ollwng carthion i ddyfrffyrdd Cymru?
Wedi'i ateb gan Y Gweinidog Newid Hinsawdd | Wedi'i ateb ar 19/03/2024
Storm Overflow discharges by water companies are governed by environmental permitting legislation. Wales’ environmental regulator, Natural Resources Wales, is responsible for enforcement and has a range of tools to investigate and, where, appropriate, prosecute water companies.