Lake Meredith
Crowley County, Colorado6,223 acresView 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.
- 76 ft max depth
- Limited data
Lake Meredith in Crowley County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 6223 acres.
- Max depth
- ~76 ft est.
- Area
- 6,223 acres
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Watch Lake Meredith’s letter
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Why Lake Meredith 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 Lake Meredith, 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 CDPHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Meredith is a 6,223-acre lake in Crowley County, Colorado with an estimated average depth of about 76 feet.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2023-10-17. Grade methodology: LakeQuality methodology.
What Lake Meredith is good for
From access and monitoring records, not editorial picks.
- Big water6,223 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Lake Meredith is listed impaired under Clean Water Act §303(d) (IR 5) for metals (other than mercury). Check local advisories before you swim.
Water quality measurements for Lake Meredith
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 |
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~76 ft est. |
| Average Depth | ~9 ft est. |
| Surface Area | 6,223 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Colorado has not published bathymetry for Lake Meredith.
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.
Fishing Lake Meredith
Reservoir Info (USACE NID)
Lake Meredith is a man-made reservoir impounded by the Lake Meredith (completed 1926), built primarily for irrigation on the Bob Creek; earth-type dam, 30 ft tall and 100 ft long.
- Surface area
- 6,223 ac
- Normal storage
- 39,804 ac-ft
- Max storage
- 41,413 ac-ft
- Drainage area
- 115 sq mi
- Hazard class
- Significant
- Owner
- COLORADO CANAL COMPANY (MATT ROULEAU)
All listed purposes: Irrigation;Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID CO01836 · Operator website
EPA Impairment Status
Lake Meredith is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit COARLA12_A · Official waterbody report
Graded lakes near Lake Meredith
Lake Meredith has no grade, but these lakes within a short drive do.
Nearby Lakes in Crowley County
Frequently asked questions about Lake Meredith
Where is Lake Meredith?
- Lake Meredith is a lake in Crowley County, Colorado. 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 Lake Meredith?
- Lake Meredith in Crowley County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 6223 acres.
Is Lake Meredith safe to swim in?
- The letter is not a swimming clearance. Lake Meredith is listed impaired under Clean Water Act §303(d) (IR 5) for metals (other than mercury). Check local advisories before you swim.
How deep is Lake Meredith?
- No published bathymetric survey covers Lake Meredith, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 76 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 6223 acres.
Explore Lake Meredith across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado Dept. of Public Health & Environment-WQCD
21COL001_WQX4 samples · 2023
Analytical methods
- Secchi disk depth measurement
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Nitrogen in Water by Pyrolysis Detection
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)