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Water system · PWSID CO0116001

DENVER WATER BOARD

DENVER, CO · ~1,287,000 people served

Check your exact address → DENVER overview
100
Excellent
PurityRadar safety score

PWSID

CO0116001

State

Colorado

City

DENVER

Population served

1,287,000

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

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 Dec 2023). Levels in parts per trillion (ppt).

Lithium

10,400 ppt

limit —

No federal limit

Violations & enforcement

125

Violations on record

0

Unaddressed

0

Health-based

25

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2024. Official EPA record →

Monitoring & reporting · EPA contaminant 0300 began Mar 2024 Resolved
Monitoring & reporting · Combined radium-226/228 began Jan 2024 Resolved
Monitoring & reporting · EPA contaminant 0300 began Sep 2022 Resolved
Monitoring & reporting · EPA contaminant 0300 began May 2019 Resolved
Monitoring & reporting · EPA contaminant 2032 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2033 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2015 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2039 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2040 began Jan 2014 Resolved
Monitoring & reporting · EPA contaminant 2036 began Jan 2014 Resolved

Recent enforcement actions

  • State action · SOX Aug 2024
  • State action · SOX May 2024
  • State action · SIA Apr 2024
  • State action · SIA Apr 2024
  • State action · SIE Apr 2024
  • State action · SIE Apr 2024
  • State action · SOX Nov 2022
  • State action · SIE Oct 2022

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.

ContaminantMedian · max · samples

Nitrate

3 stations · latest Dec 2024

3.7 · max 28.3 mg/L · 432

Arsenic

11 stations · latest Mar 2026

0.831 · max 7.7 ug/L · 240

Manganese

12 stations · latest Mar 2026

58.4 · max 445 ug/L · 169

Copper

9 stations · latest Mar 2026

2.6 · max 8.5 ug/L · 150

Fluoride

4 stations · latest Oct 2023

0.57 · max 0.76 mg/l · 112

Lead

8 stations · latest Mar 2026

0.26 · max 12 ug/L · 83

Atrazine

1 station · latest Dec 2023

13.9 · max 64.6 ng/l · 80

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 CO0116001 — 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.