Lake Waco N Bosque Arm
McLennan County, TexasView mapDirections
Nutrients and algae run well above the regional average.
↓ down from D at the last regrade
- Hypereutrophic
- #1 of 3 in the county
- Public access
- Limited data
Lake Waco N Bosque Arm in McLennan County, Texas has a water quality grade of F (Algae-prone). Water clarity: 1.3 ft visibility. Phosphorus: 41.6 µg/L. Chlorophyll-a (algae): 43.2 µg/L.
- Clarity
- 1.3 ft
- Type
- Hypereutrophic
- Phosphorus
- 41.6 µg/L
- Chlorophyll-a
- 43.2 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Lake Waco N Bosque Arm is a highly nutrient-loaded hypereutrophic lake in McLennan County, Texas. Water quality is graded F based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 4 public boat landings. Compared to the 2 other monitored lakes in McLennan County, Lake Waco N Bosque Arm ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2025-11-04. Grade methodology: LakeQuality methodology.
What Lake Waco N Bosque Arm is good for
From access and monitoring records, not editorial picks.
- Boat launch4 documented ramps
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. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
Very murky, less than 1.3 ft of visibility. Phosphorus 41.6 µg/L. Chlorophyll-a 43.2 µg/L. TSI 66. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | Not graded |
| Phosphorus | 41.6 µg/L | Fair |
| Chlorophyll-a (Algae) | 43.2 µg/L | Poor |
| Trophic State Index (TSI) | 66 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
→ Lake Waco N Bosque Arm water level: the live USGS gauge reading
Recreation & Access
- Flatrock ParkPublic
- Airport Park EastPublic
- Reynolds Creek ParkPublic
- Airport Park WestPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Waco N Bosque Arm
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.005 m/yr | 5 |
| Phosphorus | ↑ Improving | -9.7 µg/L/yr | 3 |
| Chlorophyll-a | ↑ Improving | -8.71 µg/L/yr | 3 |
County Ranking
Ranked #1 of 3 lakes in McLennan County
Nearby Lakes in McLennan County
Frequently asked questions about Lake Waco N Bosque Arm
Where is Lake Waco N Bosque Arm?
- Lake Waco N Bosque Arm is a lake in McLennan 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 Waco N Bosque Arm?
- Lake Waco N Bosque Arm in McLennan County, Texas has a water quality grade of F (Algae-prone). Water clarity: 1.3 ft visibility. Phosphorus: 41.6 µg/L. Chlorophyll-a (algae): 43.2 µg/L.
Is Lake Waco N Bosque Arm safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Lake Waco N Bosque Arm?
- Lake Waco N Bosque Arm has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Flatrock Park, Airport Park East, Reynolds Creek Park, Airport Park West. Public access is listed as yes.
Explore Lake Waco N Bosque Arm across LakeQuality
6.2 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
Where to stay at Texas's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
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Other Grade F Lakes in Texas
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Where this data comes from
47 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
TCEQMAIN47 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
Named boat-access points from the USGS National Boat Ramps inventory