New Market Pond
Middlesex County, New Jersey18 acresView mapDirections
NJDEP publishes the water-quality measurements for New Market Pond. Here is what has been measured.
- Mesotrophic
- Impaired · Impaired biota (cause unknown)
- Limited data
New Market Pond in Middlesex County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Water clarity: 3.2 ft visibility. Phosphorus: 141.5 µg/L. Chlorophyll-a (algae): 4.6 µg/L. Surface area: 18 acres.
New Market Pond is a 18-acre mesotrophic lake in Middlesex County, New Jersey. Compared to the 2 other monitored lakes in Middlesex County, New Market Pond ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-11-09. 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. New Market Pond is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), dioxins, mercury, metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pCBs. Check local advisories before you swim.
Whether New Market Pond is safe to swim in today is a call for the New Jersey Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for New Market Pond
These are the measurements NJDEP publishes for New Market Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3.2 ft of visibility. Phosphorus 141.5 µg/L. Chlorophyll-a 4.6 µg/L. TSI 60.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 142µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 4.6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 60 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about New Market Pond
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Lake Details
Surface area
18 acres
No bathymetric survey has been published for New Market Pond, so its depth is not documented here.
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Fishing New Market Pond
Reservoir Info (USACE NID)
New Market Pond is a man-made reservoir impounded by the New Market Pond Dam (completed 1830), built primarily for recreation on the Bound Brook; earth-type dam, 7 ft tall and 300 ft long.
- Surface area
- 18 ac
- Normal storage
- 70 ac-ft
- Max storage
- 109 ac-ft
- Drainage area
- 16.3 sq mi
- Hazard class
- Significant
- Owner
- Township of Piscataway
Source: USACE National Inventory of Dams, NID ID NJ00375 · Operator website
EPA Impairment Status
New Market Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Drinking water, Aquatic life, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030105120100-01 · Official waterbody report
Nearby Lakes in Middlesex County
Frequently asked questions about New Market Pond
Where is New Market Pond?
- New Market Pond is a lake in Middlesex County, New Jersey. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of New Market Pond?
- New Market Pond in Middlesex County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Water clarity: 3.2 ft visibility. Phosphorus: 141.5 µg/L. Chlorophyll-a (algae): 4.6 µg/L. Surface area: 18 acres.
Is New Market Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. New Market Pond is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), dioxins, mercury, metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), pCBs. Check local advisories before you swim.
Explore New Market Pond across LakeQuality
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Where this data comes from
48 measurements from 2 monitoring stations, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM48 samples · 2022–2023
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (2)
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