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Failing Water Quality

Rapid City, SD 57703

Pennington County · Population served: 25,608

Water Systems Serving This Area

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BOX ELDER
Groundwater · Pop. 14,000
PWSID: SD4600046
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RAPID VALLEY SANITARY DISTRICT
Surface water · Pop. 11,408
PWSID: SD4600274
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DARLINGTON ESTATES
Groundwater · Pop. 25
PWSID: SD4600403
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MESA VIEW WATER ASSOCIATION
Groundwater · Pop. 100
PWSID: SD4602177
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COTTONWOOD GROVE MOBILE HOME PARK
Surface water · Pop. 30
PWSID: SD4602225

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
4.0
15 ppb 1 ppb Warning

PFAS / Forever Chemicals

2 detected 1 above EPA limits
CompoundLevelEPA MCLHealth GuidelineStatus
PFHxS5.8 ppt10 ppt10 pptBelow limit
PFOS5.7 ppt4 ppt4 pptExceeded

Violation History (Last 5 Years)

70Total (5yr)
39Health-Based
22Major