Lynchburg Reservoir
Harris County, Texas200 acresView mapDirections
TCEQ publishes the water-quality measurements for Lynchburg Reservoir. Here is what has been measured.
- Mesotrophic
- Public access
Lynchburg Reservoir in Harris County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 1.1 ft visibility. Phosphorus: 98.5 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Surface area: 200 acres.
Lynchburg Reservoir is a 200-acre mesotrophic lake in Harris County, Texas. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 3 other monitored lakes in Harris County, Lynchburg Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2023-09-12. Methodology: how these readings are compared.
Swimming conditions
Readings onlyModerate algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lynchburg Reservoir 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 Lynchburg Reservoir
These are the measurements TCEQ publishes for Lynchburg Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 1.1 ft of visibility. Phosphorus 98.5 µg/L. Chlorophyll-a 5.9 µg/L. TSI 65.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 98.5µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 5.9µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 65 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lynchburg Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
200 acres
Public access
Yes
Listed by TCEQ
No bathymetric survey has been published for Lynchburg Reservoir, so its depth is not documented here.
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Fishing Lynchburg Reservoir
Water Quality Trend: Worsening
Based on 4 years of monitoring (2020–2023).
Water clarity
Stable4 years
Phosphorus
Worsening+9.6 µg/L/yr4 years
Chlorophyll-a
Worsening+1.84 µg/L/yr4 years
Reservoir Info (USACE NID)
Lynchburg Reservoir is a man-made reservoir impounded by the Lynchburg Reservoir Dam (completed 1976) on the Off Ch-San Jacinto River; earth-type dam, 35 ft tall and 15,315 ft long.
- Surface area
- 200 ac
- Normal storage
- 4,700 ac-ft
- Max storage
- 5,188 ac-ft
- Drainage area
- 0.32 sq mi
- Hazard class
- High
- Owner
- COASTAL WATER AUTHORITY
Source: USACE National Inventory of Dams, NID ID TX03413 · Operator website
Nearby Lakes in Harris County
Frequently asked questions about Lynchburg Reservoir
Where is Lynchburg Reservoir?
- Lynchburg Reservoir is a lake in Harris County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of Lynchburg Reservoir?
- Lynchburg Reservoir in Harris County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 1.1 ft visibility. Phosphorus: 98.5 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Surface area: 200 acres.
Is Lynchburg Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Lynchburg Reservoir?
- Public access to Lynchburg Reservoir 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
176 measurements from 2 monitoring stations, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Texas Water Science Center
USGS-TX176 samples · 2020–2023
Monitoring station identifiers (2)
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.