Peakhurst Water Hardness & Quality Report (2026)

Peakhurst's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam (Nepean River system) for the Georges River LGA inner southern Sydney distribution in New South Wales. Water hardness in Peakhurst is measured at 52.5 mg/L — classified as soft — well below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Peakhurst — a residential suburb in the Georges River LGA adjacent to Mortdale and Hurstville, known for the Peakhurst Park and Salt Pan Creek Regional Park green corridor, the Peakhurst Heights residential community, and the established inner southern Sydney community of the Georges River LGA Hurstville corridor — receives soft supply reflecting the predominantly Warragamba-dominant character of the inner southern Georges River Prospect distribution, in dramatic contrast to the very hard Carlton sub-zone (198 mg/L) in the same Georges River LGA.

Peakhurst's soft supply reflects a predominantly Warragamba Dam contribution with minimal Hawkesbury-Nepean blending at the inner southern Georges River Prospect distribution sub-zone. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing negligible dissolved minerals. At 52.5 mg/L and TDS 91.6 mg/L, Peakhurst's supply is consistently soft alongside the surrounding inner southern Georges River sub-zones (Mortdale 43.5 mg/L, Oatley 62.5 mg/L, Sans Souci 52 mg/L) — all dramatically softer than the hard Carlton Georges River sub-zone (198 mg/L) in the same LGA.

Peakhurst residents enjoy low limescale accumulation on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems accumulate minimal scale. The very low lead reading (0.002 mg/L) is excellent. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Peakhurst's inner southern Sydney residential community benefits from this soft supply meeting all ADWG standards.