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Failing Water Quality

Arroyo Grande, CA 93420

San Luis Obispo County · Population served: 31,873

Water Systems Serving This Area

🏔
CANYON CREST MUTUAL BENEFIT WC
Surface water · Pop. 133
PWSID: CA4000230
🌊
HALCYON WATER SYSTEM
Groundwater · Pop. 110
PWSID: CA4000501
🌊
WOODLAND PARK MUTUAL WATER CO
Groundwater · Pop. 538
PWSID: CA4000506
🌊
KEN MAR GARDENS
Groundwater · Pop. 84
PWSID: CA4000648
🌊
MESA DUNES MOBILE HOME ESTATES
Groundwater · Pop. 600
PWSID: CA4000650

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
14.0
15 ppb 1 ppb Warning

PFAS / Forever Chemicals

7 detected 2 above EPA limits
CompoundLevelEPA MCLHealth GuidelineStatus
PFBS11.0 ppt2000 ppt100 pptBelow limit
PFOS6.8 ppt4 ppt4 pptExceeded
PFOA5.8 ppt4 ppt4 pptExceeded
PFHxS5.5 ppt10 ppt10 pptBelow limit
PFPeA4.5 pptNo standard—Unregulated
PFHxA3.5 pptNo standard400 pptUnregulated
PFPeA3.2 pptNo standard—Unregulated

Violation History (Last 5 Years)

126Total (5yr)
60Health-Based
43Major