North Delaney Lake
Jackson County, Colorado258 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.
- 26 ft max depth
- Public access
- Limited data
North Delaney Lake in Jackson County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.2 ft visibility. Chlorophyll-a (algae): 1 µg/L. Surface area: 258 acres.
- Clarity
- 8.2 ft
- Max depth
- ~26 ft est.
- Area
- 258 acres
- Public access
- Yes
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Watch North Delaney Lake’s letter
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Why North Delaney 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 North Delaney Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
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.
North Delaney Lake is a 258-acre lake in Jackson County, Colorado with an estimated average depth of about 26 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2025-07-15. Grade methodology: LakeQuality methodology.
What North Delaney Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. North Delaney Lake 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 North Delaney Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8.2 ft. Chlorophyll-a 1 µg/L. TSI 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.2 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 1 µg/L | Not graded |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~26 ft est. |
| Average Depth | ~14 ft est. |
| Surface Area | 258 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Colorado has not published bathymetry for North Delaney 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
- Delaney Butte Lakes State Wildlife AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing North Delaney Lake
Reservoir Info (USACE NID)
North Delaney Lake is a man-made reservoir impounded by the Laune (completed 1971), built primarily for irrigation on the Roaring Fork; earth-type dam, 27 ft tall and 460 ft long.
- Surface area
- 258 ac
- Normal storage
- 3,722 ac-ft
- Max storage
- 4,496 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- Low
- Owner
- HUMBERT RANCHES INC. (HUMBERT, JESSIE)
All listed purposes: Irrigation;Fire Protection, Stock, Or Small Fish Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID CO00996 · Operator website · Matched by proximity (0.69 km)
EPA Impairment Status
North Delaney Lake 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 COUCNP09_C · Official waterbody report
Graded lakes near North Delaney Lake
North Delaney Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Jackson County
Frequently asked questions about North Delaney Lake
Where is North Delaney Lake?
- North Delaney Lake is a lake in Jackson 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 North Delaney Lake?
- North Delaney Lake in Jackson County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.2 ft visibility. Chlorophyll-a (algae): 1 µg/L. Surface area: 258 acres.
Is North Delaney Lake safe to swim in?
- The letter is not a swimming clearance. North Delaney Lake 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 North Delaney Lake?
- No published bathymetric survey covers North Delaney Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 26 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 258 acres.
Are there boat ramps on North Delaney Lake?
- North Delaney Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Delaney Butte Lakes State Wildlife Area. Public access is listed as yes.
Explore North Delaney Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado Dept. of Public Health & Environment-WQCD
21COL001_WQX2 samples · 2025
Analytical methods
- Secchi disk depth measurement
- 10200 H ~ Chlorophyll a-b-c Determination
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