Tiedman Pond
Tiedman Pond in Dane County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.4 ft visibility. Surface area: 9 acres.
- Clarity
- 0.4 ft
- Area
- 9 acres
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Dane County
Why Tiedman Pond has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Tiedman Pond, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
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 WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Tiedman Pond is a 9-acre lake in Dane County, Wisconsin. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-07-02. Grade methodology: LakeGrade methodology.
Watch Tiedman Pond water quality
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Tiedman Pond Water Quality Report Card (2026)
A printable one-page report card for Tiedman Pond: grade, clarity, phosphorus, algae, multi-year trend, depth, and fish — with sources.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Tiedman Pond
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 0.4 ft of visibility. Trophic State Index: 92.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 92 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Tiedman Pond
Compare lakeside cabins, hotels, and vacation rentals near Tiedman Pond in Dane County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Tiedman Pond
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Current Conditions
USGS snapshot Jul 6, 2026, 1:03 AM from gauge 430504089303001 (Strickers Pond Nr Longmeadow Rd at Madison, WI). Station page ↗ — a live reading replaces this snapshot when the gauge responds. Missing live data is not an all-clear.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 9 acres |
| Public Access | Yes |
No bathymetric survey has been published for Tiedman Pond, so its depth is not documented here.
Recreation & Access
- Marshall ParkPublic
- Spring Harbor ParkPublic
Fishing Tiedman Pond
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2018. 2 stations on file (most recent sample 2025).
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.021 m/yr | 6 |
EPA Impairment Status
Tiedman Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10001475 · Official waterbody report · Matched by proximity (0.07 km)
Graded lakes near Tiedman Pond
Tiedman Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Dane County
Frequently asked questions about Tiedman Pond
What is the water quality grade for Tiedman Pond?
- Tiedman Pond in Dane County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.4 ft visibility. Surface area: 9 acres.
Is Tiedman Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Tiedman Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water level at Tiedman Pond?
- The USGS snapshot on this page for Tiedman Pond is 0.94 ft of gage height, recorded Jul 6, 2026, 1:03 AM at gauge 430504089303001. Current Conditions hydrates a live NWIS reading from that same station when the gauge responds. A missed live fetch is not an all-clear.
Are there boat ramps on Tiedman Pond?
- Tiedman Pond has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Marshall Park, Spring Harbor Park. Public access is listed as yes.
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Where this data comes from
7 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX7 samples · 2020–2025
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
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory