Chloride in Hawaii well water
In Hawaii, chloride was detected in 100% of 29,421 tested private well samples.
Chloride mainly comes from road salt and water softener discharge. Above 250 mg/L water tastes salty and corrodes plumbing. Rising chloride in a well usually means road salt is reaching the aquifer.
Check your chloride number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Test your Hawaii well for chloride
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
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Systems that remove chloride
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Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.
For chloride
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
Rather have it installed and sized for your well? Book a free in-home water test with a licensed local company.
Where to get a well tested for chloride in Hawaii: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit; counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Hawaii | no limit | 3,499 | 100% | 82 | 17,200 mg/L |
| Kauai | no limit | 3,945 | 100% | 48 | 4,100 mg/L |
| Maui | no limit | 7,998 | 100% | 98 | 20,000 mg/L |
| Honolulu | no limit | 13,969 | 100% | 200 | 54,000 mg/L |
- Koloa-Poipu CCD, Kauai County100% detected of 463
- Waialua CCD, Honolulu County100% detected of 900
- Honolulu CCD, Honolulu County100% detected of 1,851
- Koolaupoko CCD, Honolulu County100% detected of 262
- Wahiawa CCD, Honolulu County100% detected of 323
- Koolauloa CCD, Honolulu County100% detected of 1,451
- Waianae CCD, Honolulu County100% detected of 786
- North Kona CCD, Hawaii County100% detected of 577
- Kau CCD, Hawaii County100% detected of 340
- Papaikou-Wailea CCD, Hawaii County100% detected of 284
- South Kohala CCD, Hawaii County100% detected of 707
- South Kona CCD, Hawaii County100% detected of 208
- Hilo CCD, Hawaii County100% detected of 431
- Keaau-Mountain View CCD, Hawaii County100% detected of 197
- North Kohala CCD, Hawaii County100% detected of 214
- North Hilo CCD, Hawaii County100% detected of 36
- Pahoa-Kalapana CCD, Hawaii County100% detected of 497
- Puunene CCD, Maui County100% detected of 79
- Kula CCD, Maui County100% detected of 150
- Waihee-Waikapu CCD, Maui County100% detected of 2,884
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. chloride counts and shares are listed on each county and town page with their sources.