Spokane Arm -Potential Discharge Location Lake
Stevens County, WashingtonView 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 · Total toxics
- Public access
- Limited data
Spokane Arm -Potential Discharge Location Lake in Stevens County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar.
- Public access
- Yes
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Why Spokane Arm -Potential Discharge Location 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 Spokane Arm -Potential Discharge Location Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
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 WA Ecology and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Spokane Arm -Potential Discharge Location Lake is a lake in Stevens County, Washington. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled 2012-02-14. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Spokane Arm -Potential Discharge Location Lake is listed impaired under Clean Water Act §303(d) (IR 5) for total toxics. Check local advisories before you swim.
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Water quality measurements for Spokane Arm -Potential Discharge Location Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Fishing Spokane Arm -Potential Discharge Location Lake
EPA Impairment Status
Spokane Arm -Potential Discharge Location Lake is officially listed as impaired under Clean Water Act §303(d) in the 2018 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WA47118I1I5_SE · Official waterbody report · Matched by proximity (0.61 km)
Graded lakes near Spokane Arm -Potential Discharge Location Lake
Spokane Arm -Potential Discharge Location Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Stevens County
Frequently asked questions about Spokane Arm -Potential Discharge Location Lake
Where is Spokane Arm -Potential Discharge Location Lake?
- Spokane Arm -Potential Discharge Location Lake is a lake in Stevens County, Washington. 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 Spokane Arm -Potential Discharge Location Lake?
- Spokane Arm -Potential Discharge Location Lake in Stevens County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Spokane Arm -Potential Discharge Location Lake safe to swim in?
- The letter is not a swimming clearance. Spokane Arm -Potential Discharge Location Lake is listed impaired under Clean Water Act §303(d) (IR 5) for total toxics. Check local advisories before you swim.
Explore Spokane Arm -Potential Discharge Location Lake across LakeQuality
Planning a trip around Lake Roosevelt?
Spokane Arm -Potential Discharge Location Lake is about 22 miles from Lake Roosevelt National Recreation Area. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Lake Roosevelt →More Washington Lake Rankings
Other Lakes in Washington
Where this data comes from
6 measurements from 1 monitoring station, 2012. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Midnite Mine Environmental Data
MIDNITE_26 samples · 2012
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
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