Llano Grande Lake
Llano Grande Lake in Hidalgo County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 181 acres.
- Area
- 181 acres
Next lake in Hidalgo County
Swipe left or right on this bar to open the next or previous lake.
Why Llano Grande 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 Llano Grande Lake, no water-quality sampling on record for this lake.
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.
Llano Grande Lake is a 181-acre lake in Hidalgo County, Texas.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Llano Grande Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Llano Grande Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Llano Grande Lake
Compare lakeside cabins, hotels, and vacation rentals near Llano Grande Lake in Hidalgo County, Texas — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Llano Grande Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Texas’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 181 acres |
No bathymetric survey has been published for Llano Grande Lake, so its depth is not documented here.
Fishing Llano Grande Lake
Nearby Lakes in Hidalgo County
Frequently asked questions about Llano Grande Lake
Where is Llano Grande Lake?
- Llano Grande Lake is a lake in Hidalgo County, Texas. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Llano Grande Lake?
- Llano Grande Lake in Hidalgo County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 181 acres.
Is Llano Grande Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Llano Grande Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Llano Grande Lake across LakeQuality
More Texas Lake Rankings
Other Lakes in Texas
Cameron County · Not rated
Cameron County · Not rated
Cameron County · Not rated
Cameron County · Not rated
Cameron County · Not rated
Cameron County · Not rated
Where this data comes from
Measurements for Llano Grande Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.