Where is Killarney Lake?

Killarney Lake is a lake in Kootenai County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.

Killarney Lake

Kootenai County, Idaho502 acresView map Directions

No nutrient or algae sampling on record from Idaho DEQ for this lake.

Area

502 acres

Surface area

Shoreline

6.4 mi

Measured length

Impaired · Mercury

See the measurements Directions Where to stay

Killarney Lake in Kootenai County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 502 acres.

Loading map…

Killarney Lake is a 502-acre lake in Kootenai County, Idaho.

Source: EPA Water Quality Portal sampling records, IDEQ. Methodology: how these readings are compared.

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. Killarney Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, metals (other than mercury). Check local advisories before you swim.

Whether Killarney Lake is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Get alerts for Killarney Lake →

Water quality measurements for Killarney Lake

These are the measurements Idaho DEQ publishes for Killarney Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Killarney Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

502 acres

Shoreline

6.4 mi

No bathymetric survey has been published for Killarney Lake, so its depth is not documented here.

Stays via Stay22

Stays near Killarney Lake

Compare lakeside cabins, hotels, and vacation rentals near Killarney Lake in Kootenai County, Idaho — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Killarney Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a whole trip? See where to stay at Idaho’s top lakes →

Follow Killarney Lake’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Killarney Lake

→ Killarney Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Killarney Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

MercuryMetals (other than mercury)

Designated uses not supporting: Aquatic life, Recreation.

Source: EPA ATTAINS assessment unit ID17010303PN022L_0L · Official waterbody report

Nearby Lakes in Kootenai County

Medicine Lake3.7 miView →Cave Lake4.2 miView →Swan Lake5 miView →Rose Lake5 miView →Black Lake6.7 miView →Blue Lake6 miView →

Frequently asked questions about Killarney Lake

Where is Killarney Lake?: Killarney Lake is a lake in Kootenai County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Killarney Lake?: Killarney Lake in Kootenai County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 502 acres.
Is Killarney Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Killarney Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, metals (other than mercury). Check local advisories before you swim.