New Marlin City Lake
Falls County, Texas485 acresView mapDirections
TCEQ publishes the water-quality measurements for New Marlin City Lake. Here is what has been measured.
- Hypereutrophic
- 48 ft max depth
- Public access
- Limited data
New Marlin City Lake in Falls County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 1.5 ft visibility. Phosphorus: 130 µg/L. Chlorophyll-a (algae): 62 µg/L. Surface area: 485 acres.
New Marlin City Lake is a 485-acre highly nutrient-loaded hypereutrophic lake in Falls County, Texas with an estimated average depth of about 48 feet. Water clarity is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2026-02-10. Methodology: how these readings are compared.
New Marlin City Lake covers about 490 acres in Falls County. If you are planning to stay, you can search lake houses and cabins around New Marlin City Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
Swimming conditions
Readings onlyLimited data
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 New Marlin City Lake 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 New Marlin City Lake
These are the measurements TCEQ publishes for New Marlin City Lake, 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 1.5 ft of visibility. Phosphorus 130 µg/L. Chlorophyll-a 62 µg/L. TSI 72.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 130µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 62µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 72 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about New Marlin City Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~48 ft est.
Surface area
485 acres
Public access
Yes
Listed by TCEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for New Marlin City Lake.
Lake Size & Watershed
Watershed (drainage) area
23 sq mi
HydroLAKES / HydroSHEDS
Shoreline
3.1 mi
HydroLAKES / HydroSHEDS
Elevation
390 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Stays via Stay22
Stays near New Marlin City Lake
Compare lakeside cabins, hotels, and vacation rentals near New Marlin City Lake in Falls 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around New Marlin City Lake are listed below.
Top-rated places to stay near New Marlin City Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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Fishing New Marlin City Lake
Water Quality Trend: Stable
Based on 5 years of monitoring (2021–2025).
Water clarity
Worsening5 years
Phosphorus
Improving-24 µg/L/yr4 years
Chlorophyll-a
Stable-0.74 µg/L/yr5 years
Reservoir Info (USACE NID)
New Marlin City Lake is a man-made reservoir impounded by the Marlin New City Lake Dam (completed 1949), built primarily for water supply on the Big Sandy Creek; earth-type dam, 37 ft tall and 3,800 ft long.
- Surface area
- 485 ac
- Normal storage
- 3,135 ac-ft
- Max storage
- 7,221 ac-ft
- Drainage area
- 22.3 sq mi
- Hazard class
- High
- Owner
- CITY OF MARLIN
Source: USACE National Inventory of Dams, NID ID TX01038 · Operator website · Matched by proximity (0.27 km)
Nearby Lakes in Falls County
Frequently asked questions about New Marlin City Lake
Where is New Marlin City Lake?
- New Marlin City Lake is a lake in Falls County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of New Marlin City Lake?
- New Marlin City Lake in Falls County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 1.5 ft visibility. Phosphorus: 130 µg/L. Chlorophyll-a (algae): 62 µg/L. Surface area: 485 acres.
Is New Marlin City Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is New Marlin City Lake?
- No published bathymetric survey covers New Marlin City Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 48 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 485 acres.
Can I fish at New Marlin City Lake?
- Public access to New Marlin City Lake 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
56 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
TCEQMAIN56 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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)