Ideq Lake
Kootenai County, IdahoView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Mercury
- Public access
- Limited data
Ideq Lake in Kootenai County, Idaho is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 5.5 µg/L. Chlorophyll-a (algae): 1.1 µg/L.
- Phosphorus
- 5.5 µg/L
- Chlorophyll-a
- 1.1 µg/L
- Public access
- Yes
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Watch Ideq Lake’s letter
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Why Ideq Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Ideq Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by IDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Ideq Lake is a lake in Kootenai County, Idaho. Limited fish-species data available. Public access is available with 5 public boat landings.
Source: EPA Water Quality Portal sampling records, IDEQ, last sampled 2012-09-19. Grade methodology: LakeQuality methodology.
What Ideq Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch5 documented ramps
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Ideq Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, metals (other than mercury). Check local advisories before you swim.
Water quality measurements for Ideq Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 5.5 µg/L. Chlorophyll-a 1.1 µg/L. TSI 30.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 5.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1.1 µg/L | Not graded |
| Trophic State Index (TSI) | 30 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Recreation & Access
- Mica BayPublic
- Loffs BayPublic
- Turner BayPublic
- Carlin BayPublic
- Goulds LandingPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Ideq Lake
EPA Impairment Status
Ideq Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit ID17010303PN001L_0L · Official waterbody report · Matched by proximity (2.37 km)
Nearby Lakes in Kootenai County
Frequently asked questions about Ideq Lake
Where is Ideq Lake?
- Ideq Lake is a lake in Kootenai County, Idaho. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Ideq Lake?
- Ideq Lake in Kootenai County, Idaho is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 5.5 µg/L. Chlorophyll-a (algae): 1.1 µg/L.
Is Ideq Lake safe to swim in?
- The letter is not a swimming clearance. Ideq Lake 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 boat ramps on Ideq Lake?
- Ideq Lake has 5 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Mica Bay, Loffs Bay, Turner Bay, Carlin Bay, among others. Public access is listed as yes.
Explore Ideq Lake across LakeQuality
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Where this data comes from
28 measurements from 2 monitoring stations, 2012. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Idaho Department Of Environmental Quality
IDEQ_CDAOFFICE_WQX28 samples · 2012
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 10200 H 3 ~ Chlorophyll a-b-c Determination by fluorometer
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory