| Awatere (including Seddon)
| Black Birch Stream
| Lower Awatere Valley including Seddon
| MIOX plant generating and injecting chlorine
|
| Blenheim
| Wells
| Blenheim township and Marlborough Ridge
| UV disinfection followed by pH correction
|
| Havelock
| Well
| Havelock township
| Chlorination
|
| Picton
| Wells
| Picton and Waikawa
| Chlorination and pH correction
|
| Picton
| Open catchment (Essons Valley)
| Picton and Waikawa
| Filtration, chlorination and pH correction
|
| Renwick
| Wells
| Renwick township
| Chlorination
|
| Riverlands
| Well
| Riverlands Industrial Estate
| None
|
| Wairau Valley
| Well
| Wairau township
| Chlorination
|
