Is Haena-Wainiha, HI Tap Water Safe to Drink?
Graded A+ with no contaminants above EPA limits. Here's everything we tested and how Haena-Wainiha ranks. What to do next ↓
96.9/100
waterverge.com Haena-Wainiha, HI — Water Quality Report
Haena-Wainiha's drinking water received a grade of A+ (96.9 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 833 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 2 violations on record, including 0 health-based violations. All violations have been resolved.
What to know about Haena-Wainiha's water
Haena-Wainiha ranks #13 out of 66 cities in Hawaii for water quality, placing it above average in the state.
Haena-Wainiha relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Haena-Wainiha may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Haena-Wainiha, HI water safe to drink?
Based on EPA testing data, Haena-Wainiha's tap water is generally safe to drink. The water system earned a grade of A+ (96.9/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 833 residents using groundwater (wells).
Recent water quality updates for Haena-Wainiha
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Haena-Wainiha's water quality assessment. Grade: A+ (96.9/100).
Contaminants: Coliform (TCR).
Contaminants: Gross Alpha, Excl. Radon and U.
Key contaminant findings
Based on the most recent EPA sampling data for Haena-Wainiha's water supply.
Well within EPA limits.
Violation history
Haena-Wainiha's water system has 2 total violations on record, including 0 health-based violations. All violations have been resolved.
Where does Haena-Wainiha's water come from?
Haena-Wainiha's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 833 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Right Branch Lawai Stream Nr Umauma Rd, Kauai (river), Weoweopilau Stream At Highway 50 Bridge, Kauai (river), Waiahi Str Us Upper Powerhouse, Kauai (river), Sf Wailua River Nr Lihue, Kauai (river), Nf Wailua Riv Abv N Wailua Ditch Int, Kauai (river).
What Haena-Wainiha residents can do
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Haena-Wainiha compares by contaminant
Explore where Haena-Wainiha ranks among all Hawaii cities for specific contaminants.
Water source & infrastructure
Where Haena-Wainiha's water comes from
Haena-Wainiha's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 833 people through 1 water system.
Water bodies near Haena-Wainiha
Haena-Wainiha is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Haena-Wainiha
| System Name | PWSID | Population | Source |
|---|---|---|---|
| HAENA-WAINIHA | HI0000415 | 833 | GW |
How Haena-Wainiha compares
Full Hawaii rankings →Haena-Wainiha's score of 96.9/100 is on par with the average of 92/100 among major Hawaii cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Hawaii rankings →About Haena-Wainiha, HI
Wikipedia →Līhuʻe is an unincorporated community, census-designated place (CDP) and the county seat of Kauaʻi County, Hawaii, United States. Līhuʻe is the second-largest town on the Hawaiian island of Kauaʻi, following Kapaʻa. As of the 2010 census, the CDP had a population of 6,455, up from 5,694 at the 2000 census.
Learn more about your water
Guides and resources related to Haena-Wainiha's water quality findings.
Explore water quality across Kauai
Frequently asked questions
Is Haena-Wainiha, HI tap water safe to drink?
Haena-Wainiha's water quality earned a grade of A+ (96.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #13 out of 66 cities tested in Hawaii.
What contaminants are in Haena-Wainiha's water?
Lead was measured at 0.0 ppb (90th percentile). 2 violations are on record.
How is Haena-Wainiha's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Haena-Wainiha?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Haena-Wainiha's water come from?
Haena-Wainiha's water is sourced from Groundwater. The city has 1 water system serving approximately 833 residents.
Is Haena-Wainiha's groundwater at risk of contamination?
Haena-Wainiha uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 2 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Haena-Wainiha's water compare to other cities?
Haena-Wainiha ranks #13 out of 66 cities in Hawaii (better than 80% of state cities) and #131 out of 15744 cities nationally (99th percentile). The grade of A+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Haena-Wainiha's small water system affect quality?
Haena-Wainiha's system serves approximately 833 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 2 violations on record.