Port Perry Lake
Perry County, Missouri187 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Mesotrophic
- #1 of 3 in the county
- Limited data
Port Perry Lake in Perry County, Missouri has a water quality grade of A (Excellent). Water clarity: 12 ft visibility. Phosphorus: 8.3 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Surface area: 187 acres.
- Clarity
- 12 ft
- Area
- 187 acres
- Type
- Mesotrophic
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Watch Port Perry Lake’s letter
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Port Perry Lake is a 187-acre mesotrophic lake in Perry County, Missouri. Water quality is graded A based on 2 sampling years through 2024. Compared to the 2 other monitored lakes in Perry County, Port Perry Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-17. Grade methodology: LakeQuality methodology.
What Port Perry Lake is good for
From access and monitoring records, not editorial picks.
- Clear water12 ft of visibility
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Good clarity, visible to about 12 ft. Phosphorus 8.3 µg/L. Chlorophyll-a 2.1 µg/L. TSI 38. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | Not graded |
| Phosphorus | 8.3 µg/L | Good |
| Chlorophyll-a (Algae) | 2.1 µg/L | Good |
| Trophic State Index (TSI) | 38 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 187 acres |
No bathymetric survey has been published for Port Perry Lake, so its depth is not documented here.
Fishing Port Perry Lake
Reservoir Info (USACE NID)
Port Perry Lake is a man-made reservoir impounded by the Port Perry Dam (completed 1973), built primarily for recreation on the TR NATIONS CREEK; earth-type dam, 70 ft tall and 900 ft long.
- Surface area
- 187 ac
- Normal storage
- 828 ac-ft
- Max storage
- 6,506 ac-ft
- Drainage area
- 3.11 sq mi
- Hazard class
- High
Source: USACE National Inventory of Dams, NID ID MO30030 · Operator website
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Port Perry Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Port Perry Service CoPerryville · 0.1 mi away · NPDES MO0116998Recent violation
- Confluence Rivers - Port Perry WwtfPerryville · 0.1 mi away · NPDES MO0139611Recent violation
- Sugar Camp Energy LlcJohnston City · 4.4 mi away · NPDES IL0079472
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.
County Ranking
Ranked #1 of 3 lakes in Perry County
Nearby Lakes in Perry County
Frequently asked questions about Port Perry Lake
Where is Port Perry Lake?
- Port Perry Lake is a lake in Perry County, Missouri. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Port Perry Lake?
- Port Perry Lake in Perry County, Missouri has a water quality grade of A (Excellent). Water clarity: 12 ft visibility. Phosphorus: 8.3 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Surface area: 187 acres.
Is Port Perry Lake safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Port Perry Lake across LakeQuality
More Missouri Lake Rankings
Other Grade A Lakes in Missouri
Mesotrophic Lakes in Missouri
Where this data comes from
21 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC21 samples · 2024
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)