Chesapeake city County, Virginia · Water Quality Report Card
Sta Mouth of Riddick Ditch Lake
Sta Mouth of Riddick Ditch Lake in Chesapeake city County, Virginia has a water quality grade of C (Fair). Water clarity: 0.7 ft visibility. Phosphorus: 60 µg/L. Chlorophyll-a (algae): 7.2 µg/L.
- Clarity
- 0.7 ft
- Mean depth
- ~7 ft est.
- Type
- Eutrophic
- Trend
- ↑ Improving
Sta Mouth of Riddick Ditch Lake is a productive, nutrient-rich eutrophic lake in Chesapeake city County, Virginia with an estimated average depth of about 7 feet. Water quality is graded C based on 2 sampling years through 2026. Overall water quality is improving over recent sampling years. Compared to the 5 other monitored lakes in Chesapeake city County, Sta Mouth of Riddick Ditch Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2026-05-21. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 0.7 ft of visibility. Phosphorus level: 60 µg/L. Chlorophyll-a: 7.2 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.7 ft | |
| Phosphorus | 60 µg/L | Poor |
| Chlorophyll-a (Algae) | 7.2 µg/L | Good |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~7 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Virginia has not published bathymetry for Sta Mouth of Riddick Ditch Lake.
Where to stay near Sta Mouth of Riddick Ditch Lake
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Fishing Sta Mouth of Riddick Ditch Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | 0 m/yr | 5 |
| Phosphorus | → Stable | -0.81 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -0.47 µg/L/yr | 5 |
Location
County Ranking
Ranked #3 of 6 lakes in Chesapeake city County
Nearby Lakes in Chesapeake city County
Explore Sta Mouth of Riddick Ditch Lake across LakeGrade
More Virginia Lake Rankings
Other Grade C Lakes in Virginia
Eutrophic Lakes in Virginia
More records, surveys & data sources
Lake Size & Watershed
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.
Where this data comes from
130 measurements from 1 monitoring station, 2012–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY
21VASWCB130 samples · 2012–2026
Analytical methods
- Tyler, John. 1968. The secchi disk, Limnology and Oceanograpy, 13(1):1-6.
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 446.0 ~ EPA; Chlorophylls and Pheopigments in Phytoplankton by Spectrophotometry
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2026-05-21
Monitoring stations: 1