Back Water Pond
Back Water Pond in Imperial County, California has a water quality grade of C (Fair). Phosphorus: 62 µg/L.
- Type
- Eutrophic
Back Water Pond is a productive, nutrient-rich eutrophic lake in Imperial County, California. Water quality is graded C based on 1 sampling years through 2025.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-09-03. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyModerate
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
No clarity data. Phosphorus level: 62 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 62 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Back Water Pond
Compare lakeside cabins, hotels, and vacation rentals near Back Water Pond in Imperial County, California — 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.
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Fishing Back Water Pond
County Ranking
Ranked #1 of 1 lakes in Imperial County
Nearby Lakes in Imperial County
Frequently asked questions about Back Water Pond
Where is Back Water Pond?
- Back Water Pond is a lake in Imperial County, California. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Back Water Pond?
- Back Water Pond in Imperial County, California has a water quality grade of C (Fair). Phosphorus: 62 µg/L.
Is Back Water Pond safe to swim in?
- Generally safe for swimming, moderate water quality. Back Water Pond has a water quality grade of C (Fair). Always check local health department advisories before swimming.
Explore Back Water Pond across LakeGrade
More California Lake Rankings
Other Grade C Lakes in California
Eutrophic Lakes in California
Where this data comes from
40 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Quechan Tribe of the Fort Yuma Indian Reservation, California & Arizona (Tribal)
QUECHAN_WQX40 samples · 2020–2025
Analytical methods
- Phosphorus by Two Reagent Colorimetry
- Turbidity by Nephelometry
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.