Every water supply on the regulator's record, zone by zone.

EVERY ZONE

Find your supply.

Type a town, supply or zone name. Chlorine is the Authority's adjusted value in the unit the supplier submitted (a "less than" result counts as 0). E. coli and total coliforms count results at 1 or more per 100 mL. Click a row with notifications to see each one.

Source: Water Services Authority - Taumata Arowai, Official Information Act response CAS-02102-L8X2C3, letter dated 3 Sep 2026. Statistics use the Authority's "Adjusted Sample Value" (a "less than" result becomes 0, a "greater than" result is held at its ceiling). Units are shown exactly as submitted and never converted; most chlorine rows are mg/L, some ppm or g/m³, and 5 zones (Albury Rural, Allandale, Mangapai, Waipatu, Wanaka Airport) carry chlorine rows the supplier labelled "MPN/100mL". 7 zones (Duvauchelle; Hook/Waituna; Lower Waihao; Otaio/Makikihi; Pigeon Bay; Waimate; Wainui) are continuous online analyser feeds, which is why their sample counts run to the thousands. 7 zones key some E. coli and total coliform results between 0 and 1 where their lab reports "less than 1"; those are never counted as detections. Nothing is de-duplicated: the extract has no sampling-site or time column, so identical rows on one day may be different sites. The chlorine maximum is withheld for 5 zones (Foxton, Levin, Shannon, Tirau, Tokomaru) where the value as held reads as a data-entry error rather than a water result; it stays withheld until the supplier confirms. E. coli detection counts are withheld for 6 Rotorua lake schemes (Hamurana, Kaharoa, Reporoa, Okareka, Rotoma, Rotoiti) whose rows are recorded as exactly 1 MPN/100 mL with no matching notification in the register, while the council's own release (August 2025 to August 2026) shows no E. coli detection on any of its schemes; they stay withheld until the council confirms what those rows are. 13 rows are supplies or zones that appear only in the register, with no sample rows in the extract. Chlorine's NZ maximum acceptable value is 5 mg/L as Cl2; E. coli's is less than 1 in 100 mL of sample.