Milan Lake North is a 15-acre productive, nutrient-rich eutrophic lake in Sullivan County, Missouri. Water quality is graded B based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Sullivan County, Milan Lake North ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-07-30. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
No clarity data. Phosphorus level: 51.8 µg/L. Chlorophyll-a: 7.8 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 51.8 µg/L | C |
| Chlorophyll-a (Algae) | 7.8 µg/L | B |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 15 acres |
Where to stay near Milan Lake North
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Fishing Milan Lake North
Water Temperature
Milan Lake North averages about 80°F at the surface in summer, usually warmest in Jul (about 81°F) and coldest in May (about 70°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 32 field readings (2010–2024) via the EPA Water Quality Portal. See the full Milan Lake North water temperature breakdown →
Location
County Ranking
Ranked #1 of 2 lakes in Sullivan County
Cleaner Lakes Within 30 Miles
Milan Lake North holds Grade B. 2 nearby lakes hold higher grades.
- BForest LakeAdair County · 23.8 mi · Higher overall water quality score
- BBrookfield LakeLinn County · 28.2 mi · Higher overall water quality score
Nearby Lakes in Sullivan County
Explore Milan Lake North across LakeGrade
More Missouri Lake Rankings
Other Grade B Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Milan Lake North is a man-made reservoir impounded by the Milan Lake Dam-North (completed 1911), built primarily for recreation on the TR-LOCUST CREEK; earth-type dam, 30 ft tall.
- Surface area
- 15 ac
- Normal storage
- 125 ac-ft
- Max storage
- 241 ac-ft
- Drainage area
- 190 sq mi
- Hazard class
- Low
- Owner
- CITY OF MILAN
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID MO10399 · Operator website
EPA Impairment Status
Milan Lake North is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7144.00 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Milan Lake North under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 2 facilities have a reported Clean Water Act violation in the past three years.
- Milan WwtpMilan · 0.6 mi away · NPDES MO0048151MajorRecent violation
- Milan Motel WwtpMilan · 1.8 mi away · NPDES MO0122734Recent violation
- Auburn Hills WwtfMilan · 1.1 mi away · NPDES MO0119318
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-07-30
Monitoring stations: 1