Milan Lake North
Sullivan County, Missouri15 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Algal growth
- 29 ft max depth
- Limited data
Milan Lake North in Sullivan County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 51.8 µg/L. Chlorophyll-a (algae): 7.8 µg/L. Surface area: 15 acres.
- Typical in August
- 81°F
- Max depth
- ~29 ft est.
- Area
- 15 acres
- Phosphorus
- 51.8 µg/L
- Chlorophyll-a
- 7.8 µg/L
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Stays near Milan Lake North
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Watch Milan Lake North’s letter
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Why Milan Lake North has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Milan Lake North, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Missouri DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Milan Lake North is a 15-acre lake in Sullivan County, Missouri with an estimated average depth of about 29 feet.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-07-30. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Milan Lake North is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
Water quality measurements for Milan Lake North
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 51.8 µg/L. Chlorophyll-a 7.8 µg/L. TSI 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 51.8 µg/L | Not graded |
| Chlorophyll-a (Algae) | 7.8 µg/L | Not graded |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
Milan Lake North typically sits around 81°F at the surface in August. Summer average is about 80°F. 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 →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~29 ft est. |
| Average Depth | ~12 ft est. |
| Surface Area | 15 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Milan Lake North.
Lake Size & Watershed
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.
Fishing Milan Lake North
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
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.
Graded lakes near Milan Lake North
Milan Lake North has no grade, but these lakes within a short drive do.
Nearby Lakes in Sullivan County
Frequently asked questions about Milan Lake North
Where is Milan Lake North?
- Milan Lake North is a lake in Sullivan County, Missouri. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Milan Lake North?
- Milan Lake North in Sullivan County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 51.8 µg/L. Chlorophyll-a (algae): 7.8 µg/L. Surface area: 15 acres.
Is Milan Lake North safe to swim in?
- The letter is not a swimming clearance. Milan Lake North is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
What is the water temperature of Milan Lake North?
- Milan Lake North typically sits around 81°F at the surface in August, from 32 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Milan Lake North?
- No published bathymetric survey covers Milan Lake North, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 29 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 15 acres.
Explore Milan Lake North across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC4 samples · 2024
Analytical methods
- 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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)