Canyon Lake Headwaters
Comal County, TexasView mapDirections
TCEQ publishes the water-quality measurements for Canyon Lake Headwaters. Here is what has been measured.
- Public access
- Limited data
Canyon Lake Headwaters in Comal County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 4.6 ft visibility. Chlorophyll-a (algae): 2.3 µg/L.
Canyon Lake Headwaters is a lake in Comal County, Texas. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2026-04-01. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Canyon Lake Headwaters is safe to swim in today is a call for the Texas Commission on Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Canyon Lake Headwaters
These are the measurements TCEQ publishes for Canyon Lake Headwaters, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.6 ft. Chlorophyll-a 2.3 µg/L. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 2.3µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Canyon Lake Headwaters
Water quality readings over time
2 seasons of samples on record (2022–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Nearby Lakes in Comal County
Frequently asked questions about Canyon Lake Headwaters
Where is Canyon Lake Headwaters?
- Canyon Lake Headwaters is a lake in Comal County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of Canyon Lake Headwaters?
- Canyon Lake Headwaters in Comal County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 4.6 ft visibility. Chlorophyll-a (algae): 2.3 µg/L.
Is Canyon Lake Headwaters safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Canyon Lake Headwaters?
- Public access to Canyon Lake Headwaters is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Texas's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
15 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN15 samples · 2020–2026
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.