Is Kailua tap water safe to drink?

Yes with good quality

Kailua's tap water meets all EPA standards and scores well on our analysis. It is generally safe to drink though filtration can improve taste and provide extra precaution.

85/100
Purity Score
1
Issues Found
2.8 GPG
Hardness
Not detected
PFAS

1 Issue Detected in Kailua

Arsenic Approaching Limit (0.1 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Kailua
Hawaii

9,673,496,744 · Groundwater

Kailua Water Safety and Contaminant Report

Low Risk Updated March 2026 40,514 residents
See Best Filters for Kailua
85
Purity Score

Kailua's drinking water is sourced from Groundwater and treated by Honolulu Board of Water Supply. This analysis covers PFAS testing, hardness, chlorine levels, lead risk, and overall safety.

Contaminant Levels

PFAS
ND
Lead
1.2 ppb
Nitrate
0.3 mg/L
Arsenic
0.1 mg/L
Hardness
2.8 gpg

Health Insights

  • 1
    Kailua's water meets current EPA standards. Filtration can improve taste and provide extra safety.

Score

85 /100
Excellent
"Good" threshold (70)

Kailua tap water is sourced from Groundwater and treated by Honolulu Board of Water Supply. Overall purity score: 85/100 (Excellent). Updated for 2026.

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Explore Kailua Water Data

PFAS Levels in KailuaPFAS testing data
Kailua Lead LevelsLead testing data
Water Hardness in KailuaHardness levels
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Kailua Water FAQ

Is Kailua HI tap water safe to drink in 2026?
Kailua tap water meets EPA federal drinking water standards and scores 85/100 (Excellent) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.
Does Kailua HI use chlorine or chloramine for disinfection?
Kailua uses chloramine as the primary disinfectant with a residual level of 0.7 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.
How hard is Kailua HI water and what is the TDS level?
Kailua water hardness is 2.8 grains per gallon (soft) with a TDS of 125 ppm (good). This level is unlikely to cause significant scale buildup in household plumbing.
Has PFAS been found in Kailua HI drinking water?
Based on available EPA UCMR5 monitoring data as of 2026 PFAS have not been detected above EPA advisory levels in Kailua drinking water.
What is the best water filter for Kailua?
Based on Kailua's water profile, we recommend the Clearly Filtered Water Pitcher. Kailua water scores well overall. A pitcher filter provides extra precaution and improves taste for drinking and cooking.

Nearby Reports

HonoluluHawaii — 85/100Pearl CityHawaii — 85/100HiloHawaii — 85/100

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Data Sources

  • EPA SDWIS
  • EWG Tap Water Database
  • Honolulu Board of Water Supply CCR
  • USGS monitoring data

PurityMap compiles public data. Updated March 2026.

© 2026 PurityMap. For informational purposes only.

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