Excellent Water Quality
Water Quality Summary
Tap water quality in Kahului, Hawaii (96733) receives an overall grade of A (Excellent) with a score of 100 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the Hawaii state average of 95. Compared to the national average (75), this area performs significantly better. The area is served by Wailuku, a surface water system providing water to approximately 74,511 people. The area has a clean violation record over the past 5 years — a positive indicator of consistent water quality management.
A score of 100/100 means the water supply in Kahului, HI meets or exceeds all EPA standards with minimal issues. Contaminant levels are well within safe limits, and the water system has maintained a strong compliance record. While no water supply is guaranteed perfect at the tap due to household plumbing, this is among the best-scoring areas in the country.
Common Questions
Based on EPA data, tap water in Kahului, Hawaii receives a grade of A (Excellent) with a score of 100/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.
ZIP code 96733 is served by 1 water system using surface water sources, providing water to approximately 74,511 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.
No lead data is currently available for ZIP code 96733. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.
No PFAS ("forever chemicals") were detected in water systems serving Kahului, Hawaii during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.
Water systems serving Kahului, Hawaii have zero violations in the last 5 years. This is a positive indicator of consistent regulatory compliance and water quality management.
Water in Kahului, Hawaii shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.