Paddington Water Hardness & Quality Report (2026)

Paddington's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant incorporating a significant Hawkesbury-Nepean component for the Woollahra Municipal Council LGA inner eastern Sydney distribution in New South Wales. Water hardness in Paddington is measured at 174 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Paddington — one of Sydney's most celebrated inner eastern suburbs in the Woollahra LGA, famous for the Victorian terrace houses and Oxford Street gallery and boutique precinct, the Paddington Reservoir Gardens heritage park, the Saturday Paddington Markets, and the prestigious Woollahra residential character — receives moderately hard supply, significantly harder than the soft inner City of Sydney sub-zones (Redfern 60 mg/L), reflecting the higher Hawkesbury-Nepean proportion reaching the eastern suburbs distribution.

Paddington's moderately hard supply reflects a significant Hawkesbury-Nepean component in the inner eastern Woollahra Prospect distribution blend. The Hawkesbury-Nepean system traverses Cumberland Plain alluvial terrain and Triassic carbonate-cemented Hawkesbury Sandstone formations contributing moderate dissolved calcium and minerals before Prospect treatment. The Paddington inner eastern Woollahra distribution at 174 mg/L and TDS 397.8 mg/L receives a proportionally higher Hawkesbury-Nepean fraction than the softer inner City of Sydney sub-zones, consistent with the moderately hard character of Sydney's inner eastern suburbs supply corridor.

Paddington residents can expect moderate limescale build-up on taps and in kettles — descaling every four to six weeks is typical. Hot water systems benefit from periodic inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use in Paddington's many heritage terrace properties. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Paddington's iconic terrace community and Oxford Street cultural precinct benefit from supply meeting all ADWG standards.