Epping-Springbrook Dam-S Inlet Lake
Williams County, North DakotaView mapDirections
ND DEQ publishes the water-quality measurements for Epping-Springbrook Dam-S Inlet Lake. Here is what has been measured.
- Limited data
Epping-Springbrook Dam-S Inlet Lake in Williams County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Phosphorus: 699.5 µg/L. Chlorophyll-a (algae): 18.2 µg/L.
Epping-Springbrook Dam-S Inlet Lake is a lake in Williams County, North Dakota.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2023-07-16. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Epping-Springbrook Dam-S Inlet Lake is safe to swim in today is a call for the North Dakota Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Epping-Springbrook Dam-S Inlet Lake
These are the measurements ND DEQ publishes for Epping-Springbrook Dam-S Inlet Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 699.5 µg/L. Chlorophyll-a 18.2 µg/L. TSI 79.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 700µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 18.2µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 79 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
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Frequently asked questions about Epping-Springbrook Dam-S Inlet Lake
Where is Epping-Springbrook Dam-S Inlet Lake?
- Epping-Springbrook Dam-S Inlet Lake is a lake in Williams County, North Dakota. Its water-quality measurements are published by ND DEQ and shown on this page as reported.
What is the water quality of Epping-Springbrook Dam-S Inlet Lake?
- Epping-Springbrook Dam-S Inlet Lake in Williams County, North Dakota has water-quality measurements published by ND DEQ, shown here as reported. Phosphorus: 699.5 µg/L. Chlorophyll-a (algae): 18.2 µg/L.
Is Epping-Springbrook Dam-S Inlet Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
5 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX5 samples · 2023
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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.