Brantley Reservoir Shallow
Eddy County, New MexicoView 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 · Fish consumption advisory
- Public access
- Limited data
Brantley Reservoir Shallow in Eddy County, New Mexico is not rated for water quality — its monitoring record does not meet the evidence bar.
- Public access
- Yes
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Watch Brantley Reservoir Shallow’s letter
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Why Brantley Reservoir Shallow 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 Brantley Reservoir Shallow, 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 NMED and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Brantley Reservoir Shallow is a lake in Eddy County, New Mexico. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, NMED, last sampled 2022-04-13. Grade methodology: LakeQuality methodology.
What Brantley Reservoir Shallow 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. Brantley Reservoir Shallow is listed impaired under Clean Water Act §303(d) (IR 5) for fish consumption advisory, mercury. Check local advisories before you swim.
Water quality measurements for Brantley Reservoir Shallow
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 |
Recreation & Access
- Brantley Lake State Park - Seven RiversPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Brantley Reservoir Shallow
EPA Impairment Status
Brantley Reservoir Shallow is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit NM-2205_00 · Official waterbody report · Matched by proximity (1.02 km)
Graded lakes near Brantley Reservoir Shallow
Brantley Reservoir Shallow has no grade, but these lakes within a short drive do.
Nearby Lakes in Eddy County
Frequently asked questions about Brantley Reservoir Shallow
Where is Brantley Reservoir Shallow?
- Brantley Reservoir Shallow is a lake in Eddy County, New Mexico. 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 Brantley Reservoir Shallow?
- Brantley Reservoir Shallow in Eddy County, New Mexico is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Brantley Reservoir Shallow safe to swim in?
- The letter is not a swimming clearance. Brantley Reservoir Shallow is listed impaired under Clean Water Act §303(d) (IR 5) for fish consumption advisory, mercury. Check local advisories before you swim.
Are there boat ramps on Brantley Reservoir Shallow?
- Brantley Reservoir Shallow has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Brantley Lake State Park - Seven Rivers. Public access is listed as yes.
Explore Brantley Reservoir Shallow across LakeQuality
2 thermal springs within 22 mi, nearest Indian Big Spring
Species activity outlook by water temperature and season
Where to stay at New Mexico's top lakes, each with its grade
New Mexico's cleanest and most-polluted lakes, ranked
Planning a trip around Carlsbad Caverns?
Brantley Reservoir Shallow is about 31 miles from Carlsbad Caverns National Park. 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 Carlsbad Caverns →More New Mexico Lake Rankings
Other Lakes in New Mexico
Where this data comes from
5 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- NM Environmental Dept./SWQB
21NMEX_WQX5 samples · 2021–2022
Analytical methods
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
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
Named boat-access points from the USGS National Boat Ramps inventory