Colby City Pond
Thomas County, KansasView mapDirections
KDHE publishes the water-quality measurements for Colby City Pond. Here is what has been measured.
- Limited data
Colby City Pond in Thomas County, Kansas has water-quality measurements published by KDHE, shown here as reported. Chlorophyll-a (algae): 10.4 µg/L.
Colby City Pond is a lake in Thomas County, Kansas.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2018-08-07. Methodology: how these readings are compared.
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Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Colby City Pond is safe to swim in today is a call for the Kansas Department of Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Colby City Pond
These are the measurements KDHE publishes for Colby City Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Chlorophyll-a 10.4 µg/L. TSI 54.
| 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 | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 10.4µg/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. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Colby City Pond
Where is Colby City Pond?
- Colby City Pond is a lake in Thomas County, Kansas. Its water-quality measurements are published by KDHE and shown on this page as reported.
What is the water quality of Colby City Pond?
- Colby City Pond in Thomas County, Kansas has water-quality measurements published by KDHE, shown here as reported. Chlorophyll-a (algae): 10.4 µg/L.
Is Colby City Pond 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
1 measurement from 1 monitoring station, 2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX1 sample · 2018
Analytical methods
- 10200 H ~ Chlorophyll a-b-c Determination
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.