Drinking water quality · 2024
· Verified
What's in Boulder, CO tap water
10 contaminants were measured in the Boulder, CO water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 10
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CO
Where your water comes from · EPA SDWIS
Boulder, CO buys its drinking water from BOULDER CITY OF.
Source
Treatment
Distribution
Also buys water from BOULDER CITY OF.
Historical readings · EPA Six-Year Review (2012–2019)
8 historically-detected contaminants in Boulder, CO
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
HAA5 worst: 2019 | 0.0555 mg/L 93% | 0.06 mg/L | '19 |
TTHM worst: 2019 | 0.0692 mg/L 87% | 0.08 mg/L | '19 |
DCAA worst: 2019 | 0.0206 mg/L | — | '19 |
MCAA worst: 2019 | 0.0018 mg/L | — | '19 |
TCAA worst: 2019 | 0.0331 mg/L | — | '19 |
BROMODICHLOROMETHANE worst: 2019 | 0.0083 mg/L | — | '19 |
CHLOROFORM worst: 2019 | 0.0602 mg/L | — | '19 |
DIBROMOCHLOROMETHANE worst: 2019 | 0.0007 mg/L | — | '19 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.84–1.31 mg/LReported levelSystem-wide | 4 mg/LMRDL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.59–0.6 mg/LReported levelSystem-wide | 4 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.05–0.1 mg/LReported levelSystem-wide | 10 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1.7 ug/L90th percentileAt the tap | 15 ug/LAction level | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.14 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0.5–1 ug/LReported levelSystem-wide | 100 ug/LMCL | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.01–0.01 mg/LReported levelSystem-wide | 2 mg/LMCL | Within the limit |
| SodiumA naturally occurring salt component. | 4.5–6 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
People also ask about Boulder, CO's water
+Is Boulder, CO tap water safe to drink in 2024?
Every one of the 10 contaminants measured in Boulder, CO's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Boulder, CO tap water?
10 contaminants were measured in Boulder, CO's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Boulder, CO's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Boulder, CO's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.