Chaparral Park Lake
Maricopa County, ArizonaView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- #1 of 3 in the county
- Limited data
Chaparral Park Lake in Maricopa County, Arizona has a water quality grade of B (Good). Water clarity: 3 ft visibility. Phosphorus: 23 µg/L.
- Clarity
- 3 ft
- Type
- Eutrophic
- Phosphorus
- 23 µg/L
- Trend
- ↑ Improving
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Stays near Chaparral Park Lake
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Top-rated places to stay near Chaparral Park Lake
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Watch Chaparral Park Lake’s letter
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Chaparral Park Lake is a productive, nutrient-rich eutrophic lake in Maricopa County, Arizona. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. Compared to the 2 other monitored lakes in Maricopa County, Chaparral Park Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2026-04-07. Grade methodology: LakeQuality methodology.
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 B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Very murky, less than 3 ft of visibility. Phosphorus 23 µg/L. TSI 55. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | Not graded |
| Phosphorus | 23 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Chaparral Park Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.017 m/yr | 2 |
| Phosphorus | ↑ Improving | -25.67 µg/L/yr | 2 |
County Ranking
Ranked #1 of 3 lakes in Maricopa County
Nearby Lakes in Maricopa County
Frequently asked questions about Chaparral Park Lake
Where is Chaparral Park Lake?
- Chaparral Park Lake is a lake in Maricopa County, Arizona. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Chaparral Park Lake?
- Chaparral Park Lake in Maricopa County, Arizona has a water quality grade of B (Good). Water clarity: 3 ft visibility. Phosphorus: 23 µg/L.
Is Chaparral Park Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Chaparral Park Lake across LakeQuality
More Arizona Lake Rankings
Other Grade B Lakes in Arizona
Eutrophic Lakes in Arizona
Where this data comes from
14 measurements from 1 monitoring station, 2022–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Great Lakes Environmental Center
GLEC14 samples · 2022–2026
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 300.0 ~ EPA; Determination of Inorganic Anions by Ion Chromatography
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.