PWSID
CO0203002
State
Colorado
City
CENTENNIAL
Population served
31,000
Primary source
Groundwater
Score history
▼ 12 points — the score moved from 100 to 88 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Aug 2023). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
4.6 ppt
limit 4 ppt
Lithium
10,600 ppt
limit —
PFBA
5.5 ppt
limit —
PFPeA
5.4 ppt
limit —
PFHxA
4.6 ppt
limit —
PFBS
4.5 ppt
limit —
Violations & enforcement
173
Violations on record
0
Unaddressed
0
Health-based
34
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Oct 2020. Official EPA record →
Recent enforcement actions
- State action · SOX Oct 2020
- State action · SOX Oct 2020
- State action · SOX Oct 2020
- State action · SOX Oct 2020
- State action · SOX Oct 2020
- State action · SOX Oct 2020
- State action · SOX Apr 2020
- State action · SIA Feb 2020
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
2 stations · latest Dec 2024
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system CO0203002 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.