Millville Lake-Right of Way
Rockingham County, New Hampshire54 acresView mapDirections
NHDES publishes the water-quality measurements for Millville Lake-Right of Way. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
- Limited data
Millville Lake-Right of Way in Rockingham County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 21.6 µg/L. Surface area: 54 acres.
Millville Lake-Right of Way is a 54-acre mesotrophic lake in Rockingham County, New Hampshire. Compared to the 50 other monitored lakes in Rockingham County, Millville Lake-Right of Way ranks #41 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-07-22. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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. Millville Lake-Right of Way is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Millville Lake-Right of Way 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 Millville Lake-Right of Way
These are the measurements NHDES publishes for Millville Lake-Right of Way, 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 21.6 µg/L. TSI 48.
| 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 | 21.6µg/L | Fair 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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Millville Lake-Right of Way
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Lake Details
Surface area
54 acres
No bathymetric survey has been published for Millville Lake-Right of Way, so its depth is not documented here.
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Fishing Millville Lake-Right of Way
Reservoir Info (USACE NID)
Millville Lake-Right of Way is a man-made reservoir impounded by the Millville Lake Dam (completed 1917), built primarily for recreation on the Hitty Titty Brook; earth-type dam, 20 ft tall and 484 ft long.
- Surface area
- 54 ac
- Normal storage
- 300 ac-ft
- Max storage
- 650 ac-ft
- Drainage area
- 10.18 sq mi
- Hazard class
- High
- Owner
- TOWN OF SALEM
Source: USACE National Inventory of Dams, NID ID NH00030 · Operator website · Matched by proximity (0.35 km)
EPA Impairment Status
Millville Lake-Right of Way is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700061102-06-01 · Official waterbody report
Nearby Lakes in Rockingham County
Frequently asked questions about Millville Lake-Right of Way
Where is Millville Lake-Right of Way?
- Millville Lake-Right of Way is a lake in Rockingham County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Millville Lake-Right of Way?
- Millville Lake-Right of Way in Rockingham County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 21.6 µg/L. Surface area: 54 acres.
Is Millville Lake-Right of Way safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Millville Lake-Right of Way is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
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Where this data comes from
4 measurements from 1 monitoring station, 2023–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133004 samples · 2023–2025
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