Martin Meadow Pond-Weeks
Coos County, New HampshireView mapDirections
NHDES publishes the water-quality measurements for Martin Meadow Pond-Weeks. Here is what has been measured.
- Oligotrophic
- Impaired · Algal growth
- Limited data
Martin Meadow Pond-Weeks in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 6.6 µg/L.
Martin Meadow Pond-Weeks is a cold, clear oligotrophic lake in Coos County, New Hampshire. Compared to the 12 other monitored lakes in Coos County, Martin Meadow Pond-Weeks ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-07-26. Methodology: how these readings are compared.
Swimming conditions
Readings onlyBacteria advisory
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Martin Meadow Pond-Weeks is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, biotoxins, mercury, nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.
Whether Martin Meadow Pond-Weeks is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Martin Meadow Pond-Weeks
These are the measurements NHDES publishes for Martin Meadow Pond-Weeks, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 6.6 µg/L. TSI 31.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 6.6µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading 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. | 31 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
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Fishing Martin Meadow Pond-Weeks
EPA Impairment Status
Martin Meadow Pond-Weeks 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, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK801030102-02 · Official waterbody report
Nearby Lakes in Coos County
Frequently asked questions about Martin Meadow Pond-Weeks
Where is Martin Meadow Pond-Weeks?
- Martin Meadow Pond-Weeks is a lake in Coos County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Martin Meadow Pond-Weeks?
- Martin Meadow Pond-Weeks in Coos County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 6.6 µg/L.
Is Martin Meadow Pond-Weeks safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Martin Meadow Pond-Weeks is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, biotoxins, mercury, nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.
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Where this data comes from
3 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133003 samples · 2021–2022
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
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