Where is Harrison Slough?

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

Are there campgrounds on Harrison Slough?

Harrison Slough has 1 public campground from USGS The National Map within 5 km, including Bell Bay. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Harrison Slough

Kootenai County, Idaho493 acresView map Directions

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

Area

493 acres

Surface area

Impaired · Mercury

See the measurements Directions Where to stay

Harrison Slough in Kootenai County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 493 acres.

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Harrison Slough is a 493-acre lake in Kootenai County, Idaho.

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

What Harrison Slough is good for

From access and monitoring records, not editorial picks.

Camping1 public campground nearby

Swimming conditions

No reading

Recreation use not supported

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

Whether Harrison Slough 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.

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Water quality measurements for Harrison Slough

These are the measurements Idaho DEQ publishes for Harrison Slough, 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 Harrison Slough

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

Lake Details

Surface area

493 acres

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

Recreation & Access

Campgrounds

Public campgrounds near Harrison Slough

Bell Bay4.4 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Harrison Slough

Compare lakeside cabins, hotels, and vacation rentals near Harrison Slough 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 Harrison Slough

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

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Fishing Harrison Slough

→ Harrison Slough fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Harrison Slough 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.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit ID17010303PN001L_0L · Official waterbody report

Nearby Lakes in Kootenai County

Anderson Lake1.6 miView →Thompson Lake2.6 miView →Coeur D' Alene Lake3.4 miView →Thompson Lake3.3 miView →Ideq Lake5.6 miView →Chatcolet Lake5.8 miView →

Frequently asked questions about Harrison Slough

Where is Harrison Slough?: Harrison Slough 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 Harrison Slough?: Harrison Slough in Kootenai County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 493 acres.
Is Harrison Slough safe to swim in?: Nutrient and algae readings are not a swimming clearance. Harrison Slough is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, metals (other than mercury). Check local advisories before you swim.
Are there campgrounds on Harrison Slough?: Harrison Slough has 1 public campground from USGS The National Map within 5 km, including Bell Bay. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.