Abiquiu Reservoir Chama R Inlet
Rio Arriba County, New MexicoView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Mesotrophic
- #2 of 5 in the county
- Public access
- Limited data
Abiquiu Reservoir Chama R Inlet in Rio Arriba County, New Mexico has a water quality grade of A (Excellent). Water clarity: 3.3 ft visibility. Phosphorus: 36 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
- Clarity
- 3.3 ft
- Type
- Mesotrophic
- Phosphorus
- 36 µg/L
- Chlorophyll-a
- 2.4 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Abiquiu Reservoir Chama R Inlet is a mesotrophic lake in Rio Arriba County, New Mexico. Water quality is graded A based on 2 sampling years through 2024. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 4 other monitored lakes in Rio Arriba County, Abiquiu Reservoir Chama R Inlet ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, NMED, last sampled 2024-09-12. Grade methodology: LakeQuality methodology.
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 A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Very murky, less than 3.3 ft of visibility. Phosphorus 36 µg/L. Chlorophyll-a 2.4 µg/L. TSI 52. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | Not graded |
| Phosphorus | 36 µg/L | Good |
| Chlorophyll-a (Algae) | 2.4 µg/L | Good |
| Trophic State Index (TSI) | 52 | Mesotrophic |
Moderate nutrients, good water quality
→ Abiquiu Reservoir Chama R Inlet water level: the live USGS gauge reading
Fishing Abiquiu Reservoir Chama R Inlet
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.192 m/yr | 4 |
County Ranking
Ranked #2 of 5 lakes in Rio Arriba County
Nearby Lakes in Rio Arriba County
Frequently asked questions about Abiquiu Reservoir Chama R Inlet
Where is Abiquiu Reservoir Chama R Inlet?
- Abiquiu Reservoir Chama R Inlet is a lake in Rio Arriba County, New Mexico. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Abiquiu Reservoir Chama R Inlet?
- Abiquiu Reservoir Chama R Inlet in Rio Arriba County, New Mexico has a water quality grade of A (Excellent). Water clarity: 3.3 ft visibility. Phosphorus: 36 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
Is Abiquiu Reservoir Chama R Inlet safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Abiquiu Reservoir Chama R Inlet across LakeQuality
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Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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Where this data comes from
14 measurements from 1 monitoring station, 2012–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- NM Environmental Dept./SWQB
21NMEX_WQX14 samples · 2012–2024
Analytical methods
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
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.