Newton Lake
Jasper County, IllinoisView mapDirections
Illinois EPA publishes the water-quality measurements for Newton Lake. Here is what has been measured.
- Hypereutrophic
- 64 ft max depth
- Public access
- Limited data
Newton Lake in Jasper County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 1.7 ft visibility. Phosphorus: 116 µg/L. Chlorophyll-a (algae): 46.8 µg/L.
Newton Lake is a highly nutrient-loaded hypereutrophic lake in Jasper County, Illinois with an estimated average depth of about 64 feet. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2022-10-20. Methodology: how these readings are compared.
Newton Lake has 2 public boat landings, so a lakefront rental is not the only way to get a boat on the water. For a place on the water, look through cabin and lake-house rentals near Newton Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Newton Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
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. Check local advisories before you swim.
Whether Newton Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Newton Lake
These are the measurements Illinois EPA publishes for Newton Lake, 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 1.7 ft of visibility. Phosphorus 116 µg/L. Chlorophyll-a 46.8 µg/L. TSI 70.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 116µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 46.8µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 70 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Newton Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~64 ft est.
Public access
Yes
Listed by Illinois EPA
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Illinois has not published bathymetry for Newton Lake.
Lake Size & Watershed
Watershed (drainage) area
61 sq mi
HydroLAKES / HydroSHEDS
Surface area
1,339 acres
HydroLAKES / HydroSHEDS
Shoreline
22.9 mi
HydroLAKES / HydroSHEDS
Elevation
505 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Newton LakePublic
- Newton LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Newton Lake
Compare lakeside cabins, hotels, and vacation rentals near Newton Lake in Jasper County, Illinois — 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Newton Lake are listed below.
Top-rated places to stay near Newton Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip? Cabins and lodging at Newton Lake → · more Illinois lake trips
Follow Newton Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Newton Lake
Reservoir Info (USACE NID)
Newton Lake is a man-made reservoir impounded by the Newton Station Ash Pond, built primarily for other on the NEWTON LAKE, 22 ft tall and 2,400 ft long.
- Normal storage
- 0 ac-ft
- Hazard class
- Significant
Source: USACE National Inventory of Dams, NID ID IL50719 · Operator website · Matched by proximity (0.8 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Newton Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Illinois Power Generating CompanyNewton · 1.5 mi away · NPDES IL0049191MajorRecent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Jasper County
Frequently asked questions about Newton Lake
Where is Newton Lake?
- Newton Lake is a lake in Jasper County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Newton Lake?
- Newton Lake in Jasper County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 1.7 ft visibility. Phosphorus: 116 µg/L. Chlorophyll-a (algae): 46.8 µg/L.
Is Newton Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Newton Lake?
- No published bathymetric survey covers Newton Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 64 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Newton Lake?
- Newton Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Newton Lake, Newton Lake. Public access is listed as yes.
Can I fish at Newton Lake?
- Newton Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Illinois's fish and wildlife agency, so check its current regulations before you go.
Explore Newton Lake across LakeQuality
More lakes in Illinois
Other Lakes in Illinois
Hypereutrophic Lakes in Illinois
Where this data comes from
50 measurements from 4 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- illinois epa
IL_EPA_WQX50 samples · 2022
Analytical methods
- MEASURED IN FIELD
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
Monitoring station identifiers (4)
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory