Re-entry Update: Find Lahaina zones that have re-opened. Re-entry for Kula has completed.

Water and Wastewater

Drinking Water

Lahaina and Upper Kula Unsafe Water Advisories

Unsafe Water Advisories for parts of Lahaina and Upper Kula are currently in place and were issued by the Maui County Department of Water Supply (DWS) following the August 2023 Maui Wildfires. 

Update (9/12/23) -  Amended Unsafe Water Advisory for Upper Kula

DWS lifted the Unsafe Water Advisory for Zone 1 of Upper Kula. Water serving homes and buildings in Zone 1 has been determined to be safe for unrestricted use.  Water may have stagnated within homes and buildings while the advisory was in affect for Zone 1. Customers are encouraged to flush their lines for at least 10 minutes to address this concern.  Read full update.

For homes and businesses in the advisory areas:

DO NOT DRINK YOUR TAP WATER

Bottled water or potable water provided by DWS must be used for drinking (including making baby formula and juice), brushing teeth, making ice, and food preparation. 

DO NOT TRY TO TREAT THE WATER YOURSELF 

Boiling, freezing, filtering, adding chlorine or other disinfectants or letting water stand will not make the water safe. If volatile organic compound (VOC) contamination is suspected or detected, boiling water could release VOCs into the air.

FOR SAFE, POTABLE WATER, PLEASE BRING LARGE, STERILIZED WATER CONTAINERS TO:
  • Lahaina: Kahoma Village at Front Street entrance, Lahaina Gateway Shopping Center, Honokokau Valley, Lahaina Baseyard parking area, vicinity of Kapunakea and Nahale streets intersection
  • Upper Kula: Copp Road, Kula School near cafeteria, Kula Community Center, Kula Lodge, Rice Park, Ching Store and Ulupalakua Ranch Store

Please adhere to the following additional guidance if your home or business is within the Unsafe Water Advisory Areas:

  • Do not use tap water for any consumptive purpose, including drinking, cooking, or brushing your teeth. 
  • Do not use ice from automatic ice makers. 
  • Use cold water to wash clothing or other items. Dry laundry outdoors.
  • Take showers instead of baths. 
  • Limit shower time. Use lukewarm water and ventilate the area. 
  • Use a dishwasher to wash dishes. Turn it to the air dry setting.
  • Do not use pools or hot tubs.
  • Use proper ventilation when using water indoors.

Map of Unsafe Water Advisory Areas

Determine if your property is within an advisory area and view recent post-fire water sampling test results by searching your home or business address using the search bar in the interactive map below. Purple areas on the map are included in the Unsafe Water Advisory Area. For parcels in green areas, the Unsafe Water Advisory has been lifted.

View map on full screen

To aid the public in better understanding the available post-fire water sampling test results, the following definitions are provided:

  • Method Detection Limit: refers to a minimum concentration of an analyte that can be measured above the instrument background noise. 
  • Reporting Limit: the minimum level above which an analyte can be detected and quantified with statistical confidence.
  • Instrument background noise: Instruments have detectors that convert any target analyte entering the detector into an electrical signal that can be measured. Using a calibration curve, this signal can be converted into a concentration. Instrument noise is due to the normal, random generation of electrical signal from sources other than the target analyte. Some causes are radiation, magnetic fields, loose connections or static. They have nothing to do with the specific sample being analyzed.
  • MCL: The maximum concentration level or (MCL) is the maximum concentration of a chemical that is allowed in public drinking water systems. The MCL is established by the United States Environmental Protection Agency (EPA).
  • μg/L: The symbol μg = microgram. One microgram is one millionth of a gram and one thousandth of a milligram. So if the MCL reads 2 μg/L that is 2 micrograms per liter. It is also referred to as parts per billion (ppb). 
  • ND: not detected.

About the Unsafe Water Advisories

During a wildfire, water systems may become contaminated with chemicals or bacteria, especially if a fire causes water lines to lose pressure. Drops in water pressure due to broken water lines or high water usage could cause smoke, hot gasses, and/or chemicals to be sucked into water lines. Contamination can also be caused when plastic materials in the system are exposed to high heat, typically when buried water lines are less than 1.5 feet. 

Since 2017, when a wildfire impacts a drinking water system, a common practice is to investigate for VOC contamination. Following this practice, the Unsafe Water Advisories have been put in place while DWS coordinates closely with Hawai‘i State Department of Health and U.S. Environmental Protection Agency to complete this VOC investigation. 

Returning the Lahaina and Upper Kula Water Systems to Service

DWS is working closely with Hawai‘i State Department of Health and U.S. Environmental Protection Agency to return the water systems to service. These agencies are evaluating multiple lines of evidence including:

  • Containing sources of contamination and protecting the water system:
    Areas of the systems impacted by the fire are being isolated from the rest of the system. An investigation of system hydraulics is underway to ensure that the systems are protected from further contamination.
  • Ensuring source water and water within the distribution system is safe to drink:
    Extensive testing for volatile organic compounds, bacteria, and other contaminants is underway at many points throughout each water system. DWS may flush contamination from parts of the systems. The systems will be re-tested following flushing. Several rounds of testing will occur before the water advisories are amended.

Status of Drinking Water Outside of the Advisory Areas

Since the fires, DWS has continued water sampling to closely monitor the entire water system and ensure safe drinking water for all residents. The Water Quality Laboratory continues to conduct required sampling to be in compliance with EPA regulations. DWS will continue to monitor water quality closely throughout the entire service area.

Water Quality Laboratory Information

DWS is continually sampling the water distribution system in Upper Kula and Lahaina in addition to its regulatory compliance requirements. 

It has always been the Water Quality Laboratory’s policy not to test water from private homes with the exception of lead and copper testing. If customers would like to have their water tested at their own expense, they may find a qualified lab on Hawai‘i State Department of Health’s list of labs certified for drinking water test methods, which is located at the following link.

The Hawai’i State Department of Health’s Laboratory Division is also certified and is available only to public water systems regulated by the State. There are no commercial labs in the state outside of this agency that is certified to run the VOC and SVOC test. For the State’s certified labs, please see “other labs” for mainland commercial labs that have this capability. The appropriate drinking water test method is as follows:

  • VOC EPA 524.2
  • SVOC EPA 525.3
  • Metals EPA 200.8
  • Mercury EPA 245.1
  • Coliform via enzyme substrate method 9223

Contacts:

County of Maui Department of Water Supply: 
808-270-7550 

Hawai’i State Department of Health: 
833-833-3431 or 808-586-4468
health.hawaii.gov/mauiwildfires

Wastewater

Fire-damaged wastewater infrastructure impacting service in some areas

Some wastewater infrastructure was damaged during the fires, which cut off wastewater service for many properties in fire-impacted areas. To determine if wastewater service for your home or business is impacted, refer to the map below.

IMPORTANT! FOR HOMES AND BUSINESSES WITHOUT WASTEWATER SERVICE:

If the Wastewater Service map shows that you do not have functioning sewer service, please DO NOT flush toilets or allow water down any household drain. Although your toilet may flush and water may drain initially, if the service is not functional, you risk eventual sewage backing up in the house.

County of Maui Sewer Service Status following August 2023 Wildfires

Some wastewater infrastructure was damaged during the fires, which cut off wastewater service for many properties in fire-impacted areas. To determine if wastewater service for your home or business is impacted, type your address in the search bar on the map below. Red indicates your property does not currently have active sewer service; green means sewer service is operating normally for your property.

Restoring Wastewater Service to Impacted Areas in Lahaina

The County of Maui Wastewater Reclamation Division is working to:

  • Restore Wastewater Pump Station 4 at Mala Wharf in order to provide services to Kahoma Village; and Upper Kapunakea Houselots Subdivision No. 2: Nahale Place, Ipukula Way and Kapunkea Street (mauka of Honoapi’ilani Highway)
  • Restore service to the Lahaina Cannery Mall and commercial sites makai of the property
  • Flush and assess other lines within the fire-impacted area
  • Repair Wastewater Pump Station 5 and 6 and the associated service areas
  • Restore service to Wastewater Pump Station 7 serving the Puumana Area

Status of Wastewater Service Outside the Fire-Impacted Areas

The wastewater systems above the Lahaina Bypass, within the Lahaina Business Park, Lahaina Gateway Center, Department of Hawaiian Home Lands at Villages of Leiali‘i, Lahaina Civic Center and all areas north of the Lahaina Civic Center are operating normally.

FAQ for

Water and Wastewater

Drinking Water

Is our water safe to drink?

Unsafe Water Advisories issued by the County of Maui Department of Water Supply are still in effect for the following areas:

  • Upper Kula 
  • Lahaina 

An interactive map is available and depicts the precise location of the Unsafe Water Advisories.

Updates to advisories will be provided based on monitoring results.

What are VOCs?

Volatile organic compounds (VOCs) are chemicals that easily evaporate into the air. Examples of common VOCs include benzene, toluene, trichloroethylene (TCE), and perchloroethylene (PCE). VOCs are commonly used in consumer products (e.g., plastics, paints, cleaning products, adhesives) and can be released from building materials (e.g., carpet, linoleum, composite wood products, insulation). They can also be released into the environment in smoke from wildfires, building fires, and the burning of wood, oil, or gas. Review a VOC fact sheet for additional information.

What are some sources of VOCs?

Household products including:

  • Paints, paint strippers, varnishes, stains, and other solvents
  • Wood preservatives
  • Aerosol sprays
  • Cleansers and disinfectants
  • Moth repellents and air fresheners
  • Stored fuels, leaking fuel tanks, and automotive products including motor oil
  • Hobby Supplies
  • Dry-Cleaning wastes
  • Pesticides
  • Other products including:
  • Building materials and furnishings
  • Office equipment such as copiers and printers, correction fluids and carbonless copy paper
  • Graphics and craft materials including glues and adhesives, permanent markers and photographic solutions.

Does the EPA regulate VOCs in household products?

Yes.

Does reverse osmosis remove VOCs?

By itself, the reverse osmosis process cannot take out VOCs. The VOCs will pass through the membrane just like oxygen does. Reverse osmosis systems will only take out VOCs, if they have a carbon pre-filter or post-filter. Contact the manufacturer for specific capacities of your system. Keep in mind that filtration systems require regular maintenance/preventative maintenance in order to work properly.

Are VOCs dangerous?

It is difficult to generalize the dangers of waterborne VOCs because there are so many different variations of them. Furthermore, there has not been extensive testing done to determine the health risks posed by many of the household products that release VOCs. But, there is evidence exposure to VOCs has negative side effects. According to the EPA, volatile organic compounds are associated with irritation of the eyes, nose, and throat, headaches, loss of coordination, and nausea. Prolonged exposure can cause damage to the liver, kidneys, and central nervous system. Whether or not they are carcinogenic is still contested. Some organics have manifested as cancerous in animals, and there are some that are suspected to cause cancer in human beings.

What do the drinking water sample test result terms mean?

  • Method Detection Limit: refers to a minimum concentration of an analyte that can be measured above the instrument background noise. 
  • Reporting Limit: the minimum level above which an analyte can be detected and quantified with statistical confidence.
  • Instrument background noise: Instruments have detectors that convert any target analyte entering the detector into an electrical signal that can be measured. Using a calibration curve, this signal can be converted into a concentration. Instrument noise is due to the normal, random generation of electrical signal from sources other than the target analyte. Some causes are radiation, magnetic fields, loose connections or static. They have nothing to do with the specific sample being analyzed.
  • MCL: The maximum concentration level or (MCL) is the maximum concentration of a chemical that is allowed in public drinking water systems. The MCL is established by the United States Environmental Protection Agency (EPA).
  • μg/L: The symbol μg = microgram. One microgram is one millionth of a gram and one thousandth of a milligram. So if the MCL reads 2 μg/L that is 2 micrograms per liter. It is also referred to as parts per billion (ppb). 
  • ND: not detected.

What is being done to restore water service and ensure water quality in the Advisory Areas will be safe to drink again?

  • The County of Maui Department of Water Supply continues regular consultation with the U.S. Environmental Protection Agency and the Hawai’i State Department of Health (DOH). In addition, the Department has sought the expert opinions of those that have experienced the devastating effects of wildfires. 
  • The Water Quality Laboratory continues to vigorously sample areas of the water system for volatile organic compounds (VOCs).
  • Additional certified personnel have been provided by DOH, to assist in the sampling efforts, increasing the amount and area of samples taken.
  • Maui samples have been prioritized, allowing for more samples to be tested at once. 

How will the Department of Water Supply decide how and when to lift the unsafe water advisory?

The decision to lift the advisory will be made based on multiple lines of evidence to include but not limited to:

  • Water Quality Sampling/Testing
  • Water Hydraulics
  • Flushing
  • Elevation
  • Data Analysis

What are the County’s next steps?

The Department of Water Supply will:

  • Continue to update as evidence suggests;
  • Continue water quality sampling/testing;
  • Monitor the system once the advisory is lifted through future sampling/testing;
  • Release those future test results to the public

What should people do in the meantime till water is deemed safe?

Failure to follow this advisory could result in illness. Due to the wildfires, some structures in the water system were either destroyed or damaged. These conditions may have caused harmful contaminants, including volatile organic chemicals (VOCs), to enter the water system. As a precaution, the Hawai'i State Department of Health and the County of Maui Department of Water Supply are advising residents of the affected area as follows:

DO NOT DRINK YOUR TAP WATER

Bottled water or potable water provided by the Department of Water Supply must be used for drinking (including making baby formula and juice), brushing teeth, making ice, and food preparation. 

DO NOT TRY TO TREAT THE WATER YOURSELF 

Boiling, freezing, filtering, adding chlorine or other disinfectants or letting water stand will not make the water safe. If volatile organic compound (VOC) contamination is suspected or detected, boiling water could release VOCs into the air.

Please adhere to the following additional guidance if your home or business is within the Unsafe Water Advisory Areas:

  • Do not use tap water for any consumptive purpose, including drinking, cooking, or brushing your teeth. 
  • Do not use ice from automatic ice makers. 
  • Use cold water to wash clothing or other items. Dry laundry outdoors.
  • Take showers instead of baths. 
  • Limit shower time. Use lukewarm water and ventilate the area. 
  • Use a dishwasher to wash dishes. Turn it to the air dry setting.
  • Do not use pools or hot tubs.
  • Use proper ventilation when using water indoors.

Where can I find potable water?

For potable water, please bring large water containers, at least 5-gallon capacity, to any of the following locations:

Lahaina:

  • Kahoma Village at Front Street entrance
  • Lahaina Gateway Shopping Center
  • Lahaina Baseyard parking area
  • Nahale street

Upper Kula:

  • Kula Lodge
  • Copp Road

FAQ for

Water and Wastewater

Wastewater

What are the County of Maui’s next steps to restore wastewater service in impacted areas of West Maui?

The County of Maui Wastewater Reclamation Division is working to:

  • Restore Wastewater Pump Station 4 at Mala Wharf in order to provide services to Kahoma Village: and Upper Kapunakea Houselots Subdivision No. 2: Nahale Place, Ipukula Way and Kapunkea Street (mauka of Honoapiilani Highway)
  • Restore service to the Lahaina Cannery Mall and commercial sites makai of the property
  • Flush and assess other lines within the fire-impacted area
  • Repair Wastewater Pump Station 5 and 6 and the associated service areas
  • Restore service to Wastewater Pump Station 7 serving the Puamana Area

Can I flush my toilet or let water run down the drain if my wastewater service is interrupted?

No; if the Wastewater Service maps show that you do not have functioning sewer service, please DO NOT flush toilets or allow water down any household drain. Although your toilet may flush and water may drain initially, if the service is not functional, you risk eventual sewage backing up in the house.

Can’t find what you are looking for and want to speak to a representative?

Please contact the State of Hawaii Maui Disaster Relief Call Center:

808-727-1550

Call Center hours: 6:00 a.m. to 10:00 p.m. (HST)