Sunrise Lake-Tanglewood Beach
Sunrise Lake-Tanglewood Beach in Strafford County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 21.6 µg/L. Surface area: 257 acres.
- Area
- 257 acres
Why Sunrise Lake-Tanglewood Beach 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 Sunrise Lake-Tanglewood Beach, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity 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.
Sunrise Lake-Tanglewood Beach is a 257-acre lake in Strafford County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-09-23. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedBacteria advisory
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Sunrise Lake-Tanglewood Beach
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 21.6 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 21.6 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Sunrise Lake-Tanglewood Beach
Compare lakeside cabins, hotels, and vacation rentals near Sunrise Lake-Tanglewood Beach in Strafford 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 Sunrise Lake-Tanglewood Beach
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 257 acres |
No bathymetric survey has been published for Sunrise Lake-Tanglewood Beach, so its depth is not documented here.
Fishing Sunrise Lake-Tanglewood Beach
Reservoir Info (USACE NID)
Sunrise Lake-Tanglewood Beach is a man-made reservoir impounded by the Sunrise Lake Dam (completed 1877), built primarily for recreation on the Tr Cocheco River; earth-type dam, 19 ft tall and 665 ft long.
- Surface area
- 257 ac
- Normal storage
- 2,120 ac-ft
- Max storage
- 2,790 ac-ft
- Drainage area
- 3.73 sq mi
- Hazard class
- High
- Owner
- SUNRISE LAKE VILLAGE DISTRICT COMMISSION
Source: USACE National Inventory of Dams, NID ID NH00310 · Operator website · Matched by proximity (0.67 km)
EPA Impairment Status
Sunrise Lake-Tanglewood Beach 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 NHLAK600030601-05-01 · Official waterbody report · Matched by proximity (0.65 km)
Graded lakes near Sunrise Lake-Tanglewood Beach
Sunrise Lake-Tanglewood Beach has no grade, but these lakes within a short drive do.
Nearby Lakes in Strafford County
Frequently asked questions about Sunrise Lake-Tanglewood Beach
Where is Sunrise Lake-Tanglewood Beach?
- Sunrise Lake-Tanglewood Beach is a lake in Strafford 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 Sunrise Lake-Tanglewood Beach?
- Sunrise Lake-Tanglewood Beach in Strafford County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 21.6 µg/L. Surface area: 257 acres.
Is Sunrise Lake-Tanglewood Beach safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Sunrise Lake-Tanglewood Beach is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Sunrise Lake-Tanglewood Beach across LakeGrade
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Mesotrophic Lakes in New Hampshire
Where this data comes from
1 measurement from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133001 sample · 2024
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
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