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Holly Hills, CO Tap Water Quality 2026

Water quality report for Holly Hills, CO — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Holly Hills's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Denver Water Board PWSID: CO0116001 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.10 ppb, 21% of the action level and no violations are open. No PFAS was detected.

A

Holly Hills earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 3.10 ppb — 21% of the federal action level
PFAS tested, none detected
35 violations since 2015, 0 health-based
No violations currently open
Holly Hills's lead level vs. all Colorado community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.10 ppb — 21% of the federal action level
✓ Lower lead than 30% of Colorado utilities
Population Served
138
~311339 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
35 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
21% of EPA action level
3.10 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.10 ppb, 21% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2024 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Diquat MONITORING AND REPORTING — 0.02 mg/L 2023–2025 Archived
Endothall MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2023–2025 Archived
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Simazine MONITORING AND REPORTING — 0.004 mg/L 2023–2025 Archived
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2023–2025 Archived
Picloram MONITORING AND REPORTING — 0.5 mg/L 2023–2025 Archived
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2023–2025 Archived
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
Aldicarb sulfoxide MONITORING AND REPORTING — — 2023–2025 Archived
Aldicarb sulfone MONITORING AND REPORTING — — 2023–2025 Archived
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Aldicarb MONITORING AND REPORTING — — 2023–2025 Archived
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
LASSO MONITORING AND REPORTING — — 2023–2025 Archived
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023–2025 Archived
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Archived
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Archived
Total Polychlorinated Biphenyls (PCB) MONITORING AND REPORTING — 0.0005 mg/L 2023–2025 Archived
1,2-DIBROMO-3-CHLOROPROPANE MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
ETHYLENE DIBROMIDE MONITORING AND REPORTING — 0.00005 mg/L 2023–2025 Archived
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2022 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2019 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

35 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Denver Water Board
PWSID CO0116001
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 138
Service connections 311,339
Systems serving this area 3
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Holly Hills tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.10 ppb, 21% of the action level.
Does Holly Hills water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Holly Hills? ▼
Denver Water Board (PWSID CO0116001), one of 3 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-08-28. Inspectors recorded 2 significant deficiencies.

What Should Holly Hills Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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