What is the water quality grade for Carter Rd Y Pit Lake?

Carter Rd Y Pit Lake in Polk County, Florida received a water quality grade of F (Very Poor). Water clarity: 2.5 ft visibility. Phosphorus: 424 µg/L.

Is Carter Rd Y Pit Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Carter Rd Y Pit Lake has an overall water quality grade of F. Always check local health department advisories before swimming.

Carter Rd Y Pit Lake

Polk County, FloridaHypereutrophic

Carter Rd Y Pit Lake is a highly nutrient-loaded hypereutrophic lake in Polk County, Florida. Water quality is graded F based on 2 sampling years through 2025. Compared to the 360 other monitored lakes in Polk County, Carter Rd Y Pit Lake ranks #299 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-09-11. Grade methodology: LakeGrade methodology.

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 2.5 ft of visibility. Phosphorus level: 424 µg/L. Trophic State Index: 78.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.5 ft	F
Phosphorus	424 µg/L	F
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	78	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Location

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County Ranking

Ranked #299 of 361 lakes in Polk County

Cleaner Lakes Within 30 Miles

Carter Rd Y Pit Lake holds Grade F. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Polk County

Scott Lake @ South Central

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Other Grade F Lakes in Florida

Alachua-Wauberg Lake

Alachua County · Clarity: 2.4 ft

Lake Roberta

Hillsborough County · Clarity: 1.3 ft

Volusia Lake George @ N of Center

Volusia County · Clarity: 2 ft

Lwc Lake

Brevard County · Clarity: 1.6 ft

Highlands-Wolf Lake

Highlands County · Clarity: 1 ft

Febin Lake

Glades County · Clarity: 1 ft

Hypereutrophic Lakes in Florida

Alicetst Lake Lake Roberta Megginnis Arm Off Crowder Landing Lake Highlands-Josephine West Lake

Regulated Pollution Sources Nearby

5 EPA-permitted facilities operate within about 5 miles of Carter Rd Y Pit Lake under Clean Water Act (NPDES) discharge permits, including 4 classified by the EPA as major dischargers. 2 facilities have a reported Clean Water Act violation in the past three years.

Mosaic Fertilizer Llc - Bonnie Facility
Bartow · 4.5 mi away · NPDES FL0000523
MajorRecent violation
Mulberry, City Of
Mulberry · 2.2 mi away · NPDES FLS266744
Major
Mosaic Fertilizer, Llc - Mulberry Chemical Plant
Mulberry · 2.7 mi away · NPDES FL0000671
Major
Mosaic Fertilizer, Llc - Nichols Concentrates
Nichols · 4.4 mi away · NPDES FL0030139
Major
Mulberry City Of
Mulberry · 1.9 mi away · NPDES FL0020338
Recent 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.

Data Sources

Water quality data from the EPA Water Quality Portal

Regulated discharger data from EPA ECHO (ICIS-NPDES)

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-09-11

Monitoring stations: 1

Where to stay near Carter Rd Y Pit Lake

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