Are you concerned about water quality in Maui? You're not alone. Water contamination is a pressing issue worldwide, and Maui, with its unique geology and heavy reliance on groundwater, is no exception. To help you stay informed, we've created this comprehensive guide to Maui's water contamination, complete with an interactive map. Let's dive in.

Understanding Maui's Water Contamination Issue

Maui's water contamination problem is primarily driven by agricultural activities, such as pesticide use, and historical industrial practices. The island's porous lava rock soil and high groundwater table exacerbate the issue, as contaminants can easily seep into the aquifer. Some of the most common contaminants include pesticides, heavy metals, and nutrients from fertilizers.
To better understand the extent and nature of Maui's water contamination, the Pacific Whale Foundation and the Surfrider Foundation Maui Chapter have collaborated to create the Maui Water Quality Map. This interactive tool provides a visual representation of water quality data across the island, helping residents and visitors alike make informed decisions about their water use.

Navigating the Maui Water Contamination Map
Using the Maui Water Quality Map is straightforward. Here's a quick guide:

- Visit the Maui Water Quality Map.
- Zoom in on the area you're interested in. You can search for a specific location using the search bar.
- Click on a data point to view detailed information about that location's water quality.
- Use the legend to interpret the data. Different colors represent different water quality parameters, such as pesticides, nutrients, or bacteria.
Key Water Quality Parameters on the Map
The Maui Water Quality Map tracks several key water quality parameters. Here's a brief overview:

| Parameter | Units | Regulatory Limit |
|---|---|---|
| Pesticides | ppb | 1 ppb (individual pesticides), 10 ppb (total pesticides) |
| Nitrate + Nitrite (Nitrogen) | mg/L | 10 mg/L |
| Phosphorus | mg/L | 0.1 mg/L |
| Enterococci Bacteria | CFU/100 mL | 104 CFU/100 mL (single sample), 105 CFU/100 mL (geometric mean) |
These parameters are crucial for understanding the health of Maui's water bodies and the safety of the water for drinking, swimming, and other activities.
What Can You Do About Maui's Water Contamination?

Maui's water contamination issue is complex and multifaceted, but there are steps you can take to help protect our water resources:
- Educate yourself and others about the issue. Share this article and the Maui Water Quality Map with your friends, family, and community.
- Support local organizations working to improve Maui's water quality, such as the Pacific Whale Foundation and the Surfrider Foundation Maui Chapter.
- Advocate for stronger regulations and enforcement of existing regulations to reduce agricultural and industrial pollution.
- Reduce your own water use and choose water-saving practices at home and in your garden.
- Support sustainable agricultural practices and buy locally grown, organic produce when possible.




















Together, we can work towards a cleaner, healthier Maui for ourselves and future generations.