Walker Pond
Walker Pond in Merrimack County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.4 ft visibility. Surface area: 169 acres.
- Clarity
- 10.4 ft
- Area
- 169 acres
Why Walker Pond has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Walker Pond, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Walker Pond is a 169-acre lake in Merrimack County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-07-18. Grade methodology: LakeGrade methodology.
Watch Walker Pond water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Walker Pond
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 10.4 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Walker Pond
Compare lakeside cabins, hotels, and vacation rentals near Walker Pond in Merrimack County, New Hampshire — 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.
Top-rated places to stay near Walker Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 169 acres |
No bathymetric survey has been published for Walker Pond, so its depth is not documented here.
Fishing Walker Pond
Reservoir Info (USACE NID)
Walker Pond is a man-made reservoir impounded by the Walker Pond Dam (completed 1900), built primarily for recreation on the Pond Brook; concrete-type dam, 6 ft tall and 37.5 ft long.
- Surface area
- 169 ac
- Normal storage
- 335 ac-ft
- Max storage
- 1,095 ac-ft
- Drainage area
- 9.09 sq mi
- Hazard class
- Undetermined
- Owner
- PENACOOK AND BOSCAWEN WATER PRECINCT
Source: USACE National Inventory of Dams, NID ID NH01334 · Operator website
EPA Impairment Status
Walker Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700030506-02 · Official waterbody report
Graded lakes near Walker Pond
Walker Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Merrimack County
Frequently asked questions about Walker Pond
Where is Walker Pond?
- Walker Pond is a lake in Merrimack County, New Hampshire. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Walker Pond?
- Walker Pond in Merrimack County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.4 ft visibility. Surface area: 169 acres.
Is Walker Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Walker Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Walker Pond across LakeGrade
More New Hampshire Lake Rankings
Top 25 by overall water quality score
Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
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Sullivan County · Not rated
Sullivan County · 26.7 ft
Belknap County · Not rated
Mesotrophic Lakes in New Hampshire
Where this data comes from
1 measurement from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2023
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database