Surprise Lake
Passaic County, New JerseyView mapDirections
No nutrient or algae sampling on record from NJDEP for this lake.
- Impaired · Temperature
- Limited data
Surprise Lake in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported.
Surprise Lake is a lake in Passaic County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-10-07. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Surprise Lake is listed impaired under Clean Water Act §303(d) (IR 5) for temperature. Check local advisories before you swim.
Whether Surprise Lake 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 Surprise Lake
These are the measurements NJDEP publishes for Surprise Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Surprise Lake
Answers come straight from the public measurements and survey records on this page.
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Fishing Surprise Lake
EPA Impairment Status
Surprise Lake 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: Aquatic life.
Source: EPA ATTAINS assessment unit NJ02030103070020-01 · Official waterbody report
Nearby Lakes in Passaic County
Frequently asked questions about Surprise Lake
Where is Surprise Lake?
- Surprise Lake is a lake in Passaic County, New Jersey. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Surprise Lake?
- Surprise Lake in Passaic County, New Jersey has water-quality measurements published by NJDEP, shown here as reported.
Is Surprise Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Surprise Lake is listed impaired under Clean Water Act §303(d) (IR 5) for temperature. Check local advisories before you swim.
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Where this data comes from
4 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM4 samples · 2024
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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