Navajo Reservoir la Jara Confluence
Rio Arriba County, New MexicoView mapDirections
NMED publishes the water-quality measurements for Navajo Reservoir la Jara Confluence. Here is what has been measured.
- Impaired · Mercury
- Limited data
Navajo Reservoir la Jara Confluence in Rio Arriba County, New Mexico has water-quality measurements published by NMED, shown here as reported. Water clarity: 13.5 ft visibility. Chlorophyll-a (algae): 1.6 µg/L.
Navajo Reservoir la Jara Confluence is a lake in Rio Arriba County, New Mexico. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, NMED, last sampled 2016-07-20. Methodology: how these readings are compared.
What Navajo Reservoir la Jara Confluence is good for
From access and monitoring records, not editorial picks.
- Clear water13.5 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Navajo Reservoir la Jara Confluence is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, temperature. Check local advisories before you swim.
Whether Navajo Reservoir la Jara Confluence is safe to swim in today is a call for the New Mexico Environment Department and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Navajo Reservoir la Jara Confluence
These are the measurements NMED publishes for Navajo Reservoir la Jara Confluence, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13.5 ft. Chlorophyll-a 1.6 µg/L. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 13.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 1.6µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Navajo Reservoir la Jara Confluence
Answers come straight from the public measurements and survey records on this page.
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Fishing Navajo Reservoir la Jara Confluence
Water Quality Trend: Improving
Based on 4 years of monitoring (2012–2016).
Water clarity
Improving4 years
Chlorophyll-a
Improving-0.6 µg/L/yr2 years
EPA Impairment Status
Navajo Reservoir la Jara Confluence is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit NM-2406_00 · Official waterbody report
Nearby Lakes in Rio Arriba County
Frequently asked questions about Navajo Reservoir la Jara Confluence
Where is Navajo Reservoir la Jara Confluence?
- Navajo Reservoir la Jara Confluence is a lake in Rio Arriba County, New Mexico. Its water-quality measurements are published by NMED and shown on this page as reported.
What is the water quality of Navajo Reservoir la Jara Confluence?
- Navajo Reservoir la Jara Confluence in Rio Arriba County, New Mexico has water-quality measurements published by NMED, shown here as reported. Water clarity: 13.5 ft visibility. Chlorophyll-a (algae): 1.6 µg/L.
Is Navajo Reservoir la Jara Confluence safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Navajo Reservoir la Jara Confluence is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, temperature. Check local advisories before you swim.
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Where this data comes from
14 measurements from 1 monitoring station, 2012–2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- UC Region of USBOR
UC_REGION_USBOR_WQX14 samples · 2012–2016
Analytical methods
- Standard Methods for the Examination of Water and Wastewater
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
Impairment status from EPA ATTAINS 303(d) database