What is the quality of the water discharged into the wells?
The water sent to the injection wells at the County of Maui treatment plants looks no different than your tap water at home. In producing this water, the County of Maui goes beyond the minimum requirements set by state and federal regulators.

Our permits require that the water consist of no more than 30 mg/l of Biochemical Oxygen Demand (BOD5), 30 mg/l Total Suspended Solids (TSS) and 10mg/l of Total Nitrogen. Nevertheless, our plants typically deliver water far cleaner than required. The County of Maui’s treatment plants normally produce effluent with less than 5mg/l BOD5 and TSS.

Our treatment plants use an aerobic biological process, nutrient removal and filtration. Because the water contains between 4 and 10 mg/l of Total Nitrogen (the regulatory limit is 10mg/l) - the effluent that our treatment facilities produce actually meets federal and state drinking water standards for Total Nitrogen.

Show All Answers

1. Why are wastewater injection wells used?
2. What is an injection well?
3. What happens in an underground injection well?
4. How many underground wastewater injection wells are owned and operated by the County of Maui?
5. Where are the County of Maui’s injection wells located?
6. Are there privately-owned and operated wastewater injection wells in the county?
7. Does the County of Maui own or operate any wastewater injection wells in Maalaea?
8. How long has the County of Maui operated underground wastewater injection wells?
9. What happened prior to the mid-1970s before the County of Maui put in injection wells to comply with the federal Clean Water Act?
10. Are algae blooms and coral reef damage caused by the reclaimed water sent down the injection wells?
11. Who regulates (controls) wastewater injections wells?
12. Do the underground injection wells operated by the County of Maui meet standard requirements?
13. What is the quality of the water discharged into the wells?
14. How much of our wastewater is recycled?
15. Why can’t the County of Maui reuse all of the recycled water its treatment facilities produce instead of routing it through underground injection wells?
16. What are the alternatives to using injection wells?
17. If the counties are required to improve existing standards and increase the use of recycled water, are federal funds available to fulfill such mandates?
18. Would my sewer rate be affected by any improvements or infrastructure needs?