Lpinelk T Lake
Hardin County, Iowa85 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Algal growth
- Limited data
Lpinelk T Lake in Hardin County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.3 ft visibility. Surface area: 85 acres.
- Clarity
- 1.3 ft
- Area
- 85 acres
- Trend
- ↑ Improving
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Watch Lpinelk T Lake’s letter
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Why Lpinelk T Lake has no grade
Lpinelk T Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Lpinelk T Lake is Not Rated — not an F. Its 1.3-foot median from 2 readings collected 2023 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by Iowa DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lpinelk T Lake is a 85-acre lake in Hardin County, Iowa. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2023-09-27. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedBacteria advisory
The letter is not a swimming clearance. Lpinelk T Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pathogens (E. coli, fecal). Check local advisories before you swim.
Water quality measurements for Lpinelk T Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1.3 ft of visibility. TSI 73.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 85 acres |
No bathymetric survey has been published for Lpinelk T Lake, so its depth is not documented here.
Fishing Lpinelk T Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.034 m/yr | 5 |
| Phosphorus | ↑ Improving | -13.8 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +11.78 µg/L/yr | 5 |
Reservoir Info (USACE NID)
Lpinelk T Lake is a man-made reservoir impounded by the Lower Pine Lake Dam (completed 1922), built primarily for recreation on the PINE CREEK; earth-type dam, 33 ft tall and 450 ft long.
- Surface area
- 85 ac
- Normal storage
- 360 ac-ft
- Max storage
- 924 ac-ft
- Drainage area
- 15.47 sq mi
- Hazard class
- Significant
- Owner
- Iowa Department of Natural Resources
All listed purposes: Recreation;Other.
Source: USACE National Inventory of Dams, NID ID IA01346 · Operator website · Matched by proximity (0.47 km)
EPA Impairment Status
Lpinelk T Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 02-IOW-758 · Official waterbody report · Matched by proximity (0.28 km)
Graded lakes near Lpinelk T Lake
Lpinelk T Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Hardin County
Frequently asked questions about Lpinelk T Lake
Where is Lpinelk T Lake?
- Lpinelk T Lake is a lake in Hardin County, Iowa. 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 Lpinelk T Lake?
- Lpinelk T Lake in Hardin County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.3 ft visibility. Surface area: 85 acres.
Is Lpinelk T Lake safe to swim in?
- The letter is not a swimming clearance. Lpinelk T Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pathogens (E. coli, fecal). Check local advisories before you swim.
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Where this data comes from
2 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Iowa DNR Surface Water Monitoring Data
21IOWA_WQX2 samples · 2023
Analytical methods
- Unknown
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