Lake Cypress Springs Mid Lake
Franklin County, Texas4,750 acresView mapDirections
Nutrients and algae run well above the regional average.
↓ down from D at the last regrade
- Hypereutrophic
- Impaired · Algal growth
- #2 of 2 in the county
- Public access
- Limited data
Lake Cypress Springs Mid Lake in Franklin County, Texas has a water quality grade of F (Algae-prone). Water clarity: 2.6 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 49.5 µg/L. Surface area: 4750 acres.
- Clarity
- 2.6 ft
- Area
- 4,750 acres
- Type
- Hypereutrophic
- Phosphorus
- 40 µg/L
- Chlorophyll-a
- 49.5 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Lake Cypress Springs Mid Lake’s letter
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Lake Cypress Springs Mid Lake is a 4,750-acre highly nutrient-loaded hypereutrophic lake in Franklin County, Texas. Water quality is graded F based on 2 sampling years through 2025. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 7 public boat landings. Compared to the 1 other monitored lakes in Franklin County, Lake Cypress Springs Mid Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2025-11-05. Grade methodology: LakeQuality methodology.
What Lake Cypress Springs Mid Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch7 documented ramps
- Big water4,750 acres
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The F is nutrients and algae, not a swimming clearance. Lake Cypress Springs Mid Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pH / acidity. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
Very murky, less than 2.6 ft of visibility. Phosphorus 40 µg/L. Chlorophyll-a 49.5 µg/L. TSI 63. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | Not graded |
| Phosphorus | 40 µg/L | Good |
| Chlorophyll-a (Algae) | 49.5 µg/L | Poor |
| Trophic State Index (TSI) | 63 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 4,750 acres |
| Public Access | Yes |
No bathymetric survey has been published for Lake Cypress Springs Mid Lake, so its depth is not documented here.
Recreation & Access
- Walleye ParkPublic
- Guthrie ParkPublic
- Mary King ParkPublic
- Dogwood ParkPublic
- FM 1519 Bridge NorthPublic
- Overlook ParkPublic
Showing 6 of 7 documented landings from the USGS National Boat Ramps inventory.
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Cypress Springs Mid Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.016 m/yr | 6 |
| Phosphorus | ↓ Declining | +1.59 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +2.85 µg/L/yr | 5 |
Reservoir Info (USACE NID)
Lake Cypress Springs Mid Lake is a man-made reservoir impounded by the Franklin County Dam (completed 1971), built primarily for water supply on the Big Cypress Creek; earth-type dam, 73 ft tall and 5,250 ft long.
- Surface area
- 4,750 ac
- Normal storage
- 67,690 ac-ft
- Max storage
- 164,000 ac-ft
- Drainage area
- 75 sq mi
- Hazard class
- High
- Owner
- FRANKLIN COUNTY WATER DISTRICT
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID TX03288 · Operator website · Matched by proximity (0.7 km)
EPA Impairment Status
Lake Cypress Springs Mid Lake 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 TX-0405_01 · Official waterbody report · Matched by proximity (0.88 km)
County Ranking
Ranked #2 of 2 lakes in Franklin County
Nearby Lakes With Higher Grades
Lake Cypress Springs Mid Lake holds Grade F. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Franklin County
Frequently asked questions about Lake Cypress Springs Mid Lake
Where is Lake Cypress Springs Mid Lake?
- Lake Cypress Springs Mid Lake is a lake in Franklin County, Texas. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Cypress Springs Mid Lake?
- Lake Cypress Springs Mid Lake in Franklin County, Texas has a water quality grade of F (Algae-prone). Water clarity: 2.6 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 49.5 µg/L. Surface area: 4750 acres.
Is Lake Cypress Springs Mid Lake safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Lake Cypress Springs Mid Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pH / acidity. Check local advisories before you swim.
Are there boat ramps on Lake Cypress Springs Mid Lake?
- Lake Cypress Springs Mid Lake has 7 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Walleye Park, Guthrie Park, Mary King Park, Dogwood Park, among others. Public access is listed as yes.
Explore Lake Cypress Springs Mid Lake across LakeQuality
More Texas Lake Rankings
Other Grade F Lakes in Texas
Hypereutrophic Lakes in Texas
Where this data comes from
58 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN58 samples · 2020–2025
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