Liberty Lake
Spokane County, WashingtonView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Mercury
- 49 ft max depth
- Public access
- Limited data
Liberty Lake in Spokane County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13 ft visibility.
- Clarity
- 13 ft
- Max depth
- ~49 ft est.
- Trend
- ↓ Declining
- Public access
- Yes
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Stays near Liberty Lake
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Watch Liberty Lake’s letter
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Why Liberty Lake has no grade
Liberty Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Liberty Lake is Not Rated — not an F. Its 13-foot median from 2 readings collected 2017–2021 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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.
Liberty Lake is a lake in Spokane County, Washington with an estimated average depth of about 49 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled 2021-07-28. Grade methodology: LakeQuality methodology.
What Liberty Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13 ft of visibility
- Boat launch1 documented ramp
- Camping1 public campground nearby
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Liberty Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species, nutrients (phosphorus, nitrogen), pesticides, pCBs. Check local advisories before you swim.
Water quality measurements for Liberty Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 13 ft. TSI 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~49 ft est. |
| Average Depth | ~49 ft est. |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Washington has not published bathymetry for Liberty Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Liberty LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Liberty Lake
- Liberty Lake Regional Park Campground2.1 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
Fishing Liberty Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.525 m/yr | 2 |
EPA Impairment Status
Liberty Lake is officially listed as impaired under Clean Water Act §303(d) in the 2018 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit WA17010305000436_001_001 · Official waterbody report
Nearby Lakes in Spokane County
Frequently asked questions about Liberty Lake
Where is Liberty Lake?
- Liberty Lake is a lake in Spokane 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 Liberty Lake?
- Liberty Lake in Spokane County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13 ft visibility.
Is Liberty Lake safe to swim in?
- The letter is not a swimming clearance. Liberty Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nuisance exotic species, nutrients (phosphorus, nitrogen), pesticides, pCBs. Check local advisories before you swim.
How deep is Liberty Lake?
- No published bathymetric survey covers Liberty Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 49 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Liberty Lake?
- Liberty Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Liberty Lake. Public access is listed as yes.
Are there campgrounds on Liberty Lake?
- Liberty Lake has 1 public campground from USGS The National Map within 5 km, including Liberty Lake Regional Park Campground. 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.
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Where this data comes from
2 measurements from 1 monitoring station, 2017–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS2 samples · 2017–2021
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory
Public campgrounds from USGS The National Map Structures, within about 3 miles