Amistad Reservoir
Val Verde County, Texas89,000 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.
- Public access
- Limited data
Amistad Reservoir in Val Verde County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 89000 acres.
- Area
- 89,000 acres
- Public access
- Yes
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Watch Amistad Reservoir’s letter
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Why Amistad Reservoir 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 Amistad Reservoir, 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 TCEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Amistad Reservoir is a 89,000-acre lake in Val Verde County, Texas. Limited fish-species data available. Public access is available with 6 public boat landings.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2023-04-26. Grade methodology: LakeQuality methodology.
What Amistad Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch6 documented ramps
- Camping2 public campgrounds nearby
- Big water89,000 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Amistad Reservoir
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 |
|---|---|
| Surface Area | 89,000 acres |
| Public Access | Yes |
No bathymetric survey has been published for Amistad Reservoir, so its depth is not documented here.
Recreation & Access
- Southwinds Marina NorthPublic
- Diablo EastPublic
- Black Brush PointPublic
- Amistad ReservoirPublic
- Spur 406 Campground - Amistad National Recreation AreaPublic
- Southwinds Marina SouthPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Amistad Reservoir
- Governors Landing Campground3.6 km
- Rock Quarry Group Campground4.4 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 Amistad Reservoir
Reservoir Info (USACE NID)
Amistad Reservoir is a man-made reservoir impounded by the Amistad Dam (completed 1969), built primarily for flood risk reduction on the Rio Grande; concrete-type dam, 287 ft tall and 32,022 ft long.
- Surface area
- 89,000 ac
- Normal storage
- 3,384,000 ac-ft
- Max storage
- 5,128,000 ac-ft
- Drainage area
- 123,134 sq mi
- Hazard class
- High
- Owner
- International Boundary and Water Commission;Mexico Comision Internacional de Limites y Aguas
All listed purposes: Flood Risk Reduction;Irrigation;Recreation;Hydroelectric.
Source: USACE National Inventory of Dams, NID ID TX02296 · Operator website
Nearby Lakes in Val Verde County
Frequently asked questions about Amistad Reservoir
Where is Amistad Reservoir?
- Amistad Reservoir is a lake in Val Verde County, Texas. 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 Amistad Reservoir?
- Amistad Reservoir in Val Verde County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 89000 acres.
Is Amistad Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Amistad Reservoir?
- Amistad Reservoir has 6 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Southwinds Marina North, Diablo East, Black Brush Point, Amistad Reservoir, among others. Public access is listed as yes.
Are there campgrounds on Amistad Reservoir?
- Amistad Reservoir has 2 public campgrounds from USGS The National Map within 5 km, including Governors Landing Campground, Rock Quarry Group 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.
Explore Amistad Reservoir across LakeQuality
Planning a trip around Amistad?
Amistad Reservoir is about 5 miles from Amistad 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 Amistad →More Texas Lake Rankings
Other Lakes in Texas
Where this data comes from
9 measurements from 1 monitoring station, 2021–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN9 samples · 2021–2023
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
Named boat-access points from the USGS National Boat Ramps inventory
Public campgrounds from USGS The National Map Structures, within about 3 miles