Statutory responsibility for the provision of drinking water supplies and for upholding the prescribed quality standards rests with sanitary authorities. Stringent drinking water standards are prescribed in the European Communities (Quality of Water Intended for Human Consumption) Regulations, 1988 (S.I. No. 81 of 1988). The duty placed on sanitary authorities to take the necessary measures to ensure that drinking water meets these standards is performed under the general supervision of the Environmental Protection Agency. Its most recent annual report on The Quality of Drinking Water in Ireland, for 1999, published on 12 December 2000, is available in the Oireachtas Library.
The report confirms the fundamentally good quality of Irish drinking water, indicating that 96% of samples from public supplies were free of faecal coliforms and 92% of such samples were free of all coliforms. The greatest continuing problem is the presence of coliforms in mainly poorly treated or untreated private group and small private supplies, although there is a welcome increase, from 58% to 62%, in compliance by group schemes. The report notes that many of the other exceedances are marginal in nature and/or reflect naturally occurring local conditions, and that an intensive programme is in place to remedy the identified deficiencies in rural water supplies.