💧 ZIP Water Report

Tap water in Niwot, CO — ZIP 80504

6 public water systems serving about 202,745 people. PFAS "forever chemicals" have been detected here.

C
Fair
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 80504

Longmont City Of
PWSID CO0107485 · serves 104,178 · surface water
0 health-based / 2 total violations (5 yrs)
A
Firestone Town Of
PWSID CO0162476 · serves 27,798 · surface water
0 health-based / 1 total violations (5 yrs)
A
Little Thompson Wd
PWSID CO0135477 · serves 25,654 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 4.8 ppt — above federal limit
C
Left Hand Wd
PWSID CO0107471 · serves 20,280 · surface water
0 health-based / 0 total violations (5 yrs)
A
Frederick Town Of
PWSID CO0162288 · serves 17,173 · surface water
0 health-based / 1 total violations (5 yrs)
A
Central Weld Cnty Wd
PWSID CO0162122 · serves 7,662 · surface water
0 health-based / 0 total violations (5 yrs)
A

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology