Drinking water quality · 2024
· Verified
What's in Arvada, CO tap water
20 contaminants were measured in the Arvada, CO water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 20
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CO
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Arvada, CO
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
Lithium
● Detected (no federal limit)below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Arvada, CO's drinking water comes from surface water, drawn from 3 sources.
Source
- RALSTON RESERVOIR
- ARVADA RESERVOIR
- CLEAR CREEK DIVERSION
Treatment
- RALSTON TP
- ARVADA TP
- RALSTON TP CFE
- + 1 more
Distribution
Historical readings · EPA Six-Year Review (2012–2019)
3 contaminants historically over EPA limits in Arvada, 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) |
|---|---|---|---|
TTHM worst: 2013 | 0.156 mg/L 1.9× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
GROSS BETA worst: 2017 | 4.8 mrem/yr 1.2× | 4 mrem/yr | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2013 | 0.0685 mg/L 1.1× | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
RADIUM 226 228 worst: 2019 | 2.6 pCi/L within near national p90 | 5 pCi/L | '12'13'14'15'16'17'18'19 |
GROSS ALPHA worst: 2015 | 5.6 pCi/L within | 15 pCi/L | '12'13'14'15'16'17'18'19 |
FLUORIDE worst: 2012 | 0.93 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
DEHP worst: 2014 | 0.00082 mg/L within | 0.006 mg/L | '14 |
BARIUM worst: 2019 | 0.037 mg/L within below national p90 | 2 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE worst: 2014 | 0.16 mg/L within | 10 mg/L | '14'15'16'17 |
NITRATE NITRITE worst: 2014 | 0.16 mg/L within | 10 mg/L | '14'15'16'17 |
URANIUM worst: 2016 | 0.0029 ug/L within below national p90 | 30 ug/L | '13'14'15'16 |
DCAA worst: 2018 | 0.0163 mg/L | — | '18'19 |
MCAA worst: 2018 | 0.0014 mg/L | — | '18 |
TCAA worst: 2018 | 0.0231 mg/L | — | '18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0025 mg/L | — | '12'18'19 |
CHLOROFORM worst: 2012 | 0.011 mg/L | — | '12'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.00088 mg/L | — | '12'18'19 |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 132 mg/LAverageArvada WTP | 500 mg/LMCL | Within the limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| AlkalinityA measure of the water's capacity to neutralize acids. | 40 mg/LAverageArvada WTP | None set | Detected — no federal limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 69 mg/LAverageArvada WTP | None set | Detected — no federal limit |
+By source (3)— Potential Effects, Arvada WTP, Ralston WTP
| |||
| pHA measure of how acidic or basic the water is. | 7.69AverageRalston WTP | None set | Detected — no federal limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.34AverageArvada WTP | None set | Detected — no federal limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.07 NTUAverageArvada WTP | None set | Detected — no federal limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 3.1 ug/L90th percentileAt the tap | 15 ug/LAction level | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 0.021 mg/LAverageRalston WTP | 0.2 mg/LMCL | Within the limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| ManganeseA naturally occurring metal from soil and rock. | 0.005 mg/LAverageArvada WTP | 0.05 mg/LMCL | Within the limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.11 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| SodiumA naturally occurring salt component. | 16 mg/LAverageArvada WTP | None set | Detected — no federal limit |
+By source (3)— Potential Effects, Arvada WTP, Ralston WTP
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 32 mg/LAverageArvada WTP | 250 mg/LMCL | Within the limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
| ChlorideA naturally occurring salt compound. | 21 mg/LAverageArvada WTP | 250 mg/LMCL | Within the limit |
+By source (2)— Arvada WTP, Ralston WTP
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.95 mg/LAverageSystem-wide | None set | Detected — no federal limit |
People also ask about Arvada, CO's water
+Is Arvada, CO tap water safe to drink in 2024?
Every one of the 20 contaminants measured in Arvada, 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 Arvada, CO tap water?
20 contaminants were measured in Arvada, CO's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 12 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 Arvada, 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 Arvada, 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.