Tap water in Rapid City, SD — ZIP 57703
4 public water systems serving about 25,478 people. PFAS "forever chemicals" have been detected here.
F
Failing
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 57703
Box Elder
PWSID SD4600046 · serves 14,000 ·
groundwater
7 health-based / 7 total violations (5 yrs)
Rapid Valley Sanitary District
PWSID SD4600274 · serves 11,408 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.8 ppt — above federal limit
Cedar Gulch 1
PWSID SD4602301 · serves 45 ·
groundwater
1 health-based / 1 total violations (5 yrs)
Darlington Estates
PWSID SD4600403 · serves 25 ·
groundwater
5 health-based / 5 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology