Well water in Juneau County, Alaska
In Juneau County, 3% of 59 tested well samples exceeded the EPA limit for fluoride (4 mg/L), based on public data from USGS Water Quality Portal.
The strongest signal is arsenic: 30% of 23 local samples were above the limit, too few samples to carry the headline but first on the test list below.
484 test results across 9 contaminants from at least 50 wells, 1956 to 1998; nitrate has the most at 85. Data refreshed September 3, 2026.
Compiled by Nick at Well Water Nerd from public records. How these pages are built
An estimated 1,808 people in Juneau County get their drinking water from a private well, per USGS 2015 county water use. That is about 6% of residents.
What individual samples found
Each row summarizes every public sample for that contaminant inside Juneau County. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.
| Contaminant | Above limit | Samples | Detected | Median | Highest | Limit |
|---|---|---|---|---|---|---|
| Arsenic 1970 to 1991 | 23 | 83% | 2 | 89 | 10 ug/L EPA limit | |
| Fluoride 1956 to 1998 | 59 | 93% | 0.2 | 11 | 4 mg/L EPA limit | |
| Nitrate 1956 to 1998 | 85 | 72% | 0.058 | 7.8 | 10 mg/L EPA limit | |
| Lead 1968 to 1991 | 25 | 88% | 0 | 14 | 15 ug/L EPA limit | |
| Copper 1968 to 1991 | 23 | 87% | 0.003 | 0.16 | 1.3 mg/L EPA limit | |
| Chloride 1956 to 1998 | no limit | 78 | 100% | 3.55 | 8,300 | 250 mg/L nuisance level |
| Sodium 1956 to 1998 | no limit | 78 | 100% | 16.5 | 5,000 | 20 mg/L health guideline |
| Iron 1956 to 1998 | no limit | 70 | 99% | 235 | 19,400 | 300 ug/L nuisance level |
| Manganese 1956 to 1998 | no limit | 43 | 95% | 61 | 1,200 | 300 ug/L health guideline |
Closer than the county
See the sampled wells near your address
The same records, drawn around one point: which wells within a few miles were sampled and what they found, how deep the wells next to you were drilled, and any leaking tank or cleanup site within a mile.
Check my addressWhat this means
The contaminants most often above their limit here are arsenic (30% of 23 samples) and fluoride (3% of 59 samples). A well next door can differ sharply from yours because bedrock fractures, well depth and plumbing all matter, so these rates describe the area, not your tap.
Chloride, Iron, and Manganese are widespread in local groundwater. They are mainly a staining and taste problem, but high manganese also carries a health advisory for infants.
What to test for in Juneau County
- 1Arsenic30% of 23 local samples were above the limit.
- 2Fluoride3% of 59 local samples were above the limit.
- 3Coliform bacteriaRecommended for every private well, every year.
- 4NitrateRecommended for every private well, especially near farms or septic systems.
- 5ChlorideDetected in 100% of local samples.
- 6IronDetected in 99% of local samples.
- 7ManganeseDetected in 95% of local samples.
- 8Volatile organic compounds (VOCs)95 leaking underground storage tank sites on record locally.
- 9Metals panel139 hazardous waste sites on record locally.
Test your Juneau County well for arsenic, fluoride and coliform bacteria
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
Just want bacteria checked first? Tap Score coliform and E. coli test, $99. Coliform and E. coli are the tests every well needs every year.
Want a quick look before paying for a lab? Home well water test strips on Amazon check hardness, iron, pH and nitrate in minutes. They are a screen, not a result: arsenic, bacteria, uranium and PFAS need a certified lab.
Affiliate links: the merchant pays us a commission and the price is the same for you. It does not change what the data above says. As an Amazon Associate we earn from qualifying purchases.
Where to get a well tested in Alaska: certified labs, state programs and prices.
Already have results back? Get your lab report read against the Juneau County numbers, $29. Every line explained, ranked by what matters, with the fix for each.
Contamination sources on record in Juneau County
Alaska DEC contaminated sites records 95 leaking underground storage tank sites and 139 hazardous waste sites in Juneau County, among 234 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.
- 95
- leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 139
- hazardous waste sitesSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
Treatment that fits the local profile
Arsenic
Point-of-use reverse osmosis; Adsorptive media (iron-based) whole-house; Anion exchange
Fluoride
Point-of-use reverse osmosis; Activated alumina; Distillation
Iron
Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration
Manganese
Oxidizing filter (greensand, birm) whole-house; Water softener (low levels); Point-of-use reverse osmosis
Systems we would look at first
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 arsenic
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For arsenic
Whole-house arsenic and uranium filter
whole-house, at the point of entry, about $2,500
Adsorptive iron-based media; sized to your well yield.
For arsenic
Aquasana SmartFlow reverse osmosis
under-sink or countertop, about $225
Certified to NSF/ANSI 58 and 53 to reduce arsenic (96%, pentavalent), fluoride (90%), lead (99%), nitrate, nitrite and PFOA/PFOS at the kitchen tap, with a remineralizer.
For iron
Iron and manganese oxidizing filter
whole-house, at the point of entry, about $1,800
Air-injection or greensand media; fixes staining at the source.
Free, no obligation
Get on the list for a free in-home water test in Juneau County
No water treatment company serves Juneau County through Well Water Nerd yet. We are signing licensed companies on county by county: they test at your tap for free, walk you through the numbers, and quote treatment only if something needs fixing. Leave your details and you are first in line. Nothing is shared until a company joins for Juneau County, and you get an email naming it first.
Common questions
Is there arsenic in well water in Juneau County?
Arsenic was detected in 83% of 23 public well samples in Juneau County, and 30% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.
How often should I test a private well in Juneau County?
Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.
Counties near Juneau County
Closest first. Groundwater does not stop at a line on a map, so the next county over is a fair second opinion.
Want the numbers themselves? Download the Alaska dataset as CSV, every county and town, with the sources named.
Sources
- USGS Water Quality Portal: 484 samples in Juneau County. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- Alaska DEC contaminated sites: 234 regulated sites located in Juneau County. Contaminated sites, including leaking tank sites, from the Alaska Department of Environmental Conservation. Retrieved September 18, 2026.
Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.