Lake Williams
Kidder County, North DakotaView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from B at the last regrade
- Mesotrophic
- #1 of 3 in the county
- 16 ft max depth
- Public access
- Limited data
Lake Williams in Kidder County, North Dakota has a water quality grade of C (Fair). Water clarity: 4.7 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 1.5 µg/L.
- Clarity
- 4.7 ft
- Max depth
- ~16 ft est.
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
- Chlorophyll-a
- 1.5 µg/L
- Public access
- Yes
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Watch Lake Williams’s letter
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Lake Williams is a mesotrophic lake in Kidder County, North Dakota with an estimated average depth of about 16 feet. Water quality is graded C based on 1 sampling years through 2024. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 2 other monitored lakes in Kidder County, Lake Williams ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2024-10-10. Grade methodology: LakeQuality methodology.
What Lake Williams is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
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 C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Murky, only visible to about 4.7 ft. Phosphorus 20 µg/L. Chlorophyll-a 1.5 µg/L. TSI 46. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.7 ft | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1.5 µg/L | Not graded |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~16 ft est. |
| Average Depth | ~13 ft est. |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. North Dakota has not published bathymetry for Lake Williams.
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.
Recreation & Access
- Lake WilliamsPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Williams
County Ranking
Ranked #1 of 3 lakes in Kidder County
Nearby Lakes in Kidder County
Frequently asked questions about Lake Williams
Where is Lake Williams?
- Lake Williams is a lake in Kidder County, North Dakota. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Williams?
- Lake Williams in Kidder County, North Dakota has a water quality grade of C (Fair). Water clarity: 4.7 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 1.5 µg/L.
Is Lake Williams safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Lake Williams?
- No published bathymetric survey covers Lake Williams, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 16 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Lake Williams?
- Lake Williams has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Williams. Public access is listed as yes.
Explore Lake Williams across LakeQuality
Species activity outlook by water temperature and season
Where to stay at North Dakota's top lakes, each with its grade
Moderate nutrients, good water quality
North Dakota's cleanest and most-polluted lakes, ranked
More North Dakota Lake Rankings
Other Grade C Lakes in North Dakota
Mesotrophic Lakes in North Dakota
Where this data comes from
20 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX20 samples · 2024
Analytical methods
- Phosphorus by Colorimetry
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
- 4500 NO3 E ~ Nitrate in Water- Cadmium Reduction
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Depth, fish, and access data from North Dakota Game & Fish
Named boat-access points from the USGS National Boat Ramps inventory