Irvine · Orange County · tap water report
Irvine tap water grades B+: 0 over the legal limit, 1 above the health guideline. Plain-English report and a free home water test.
Grade B+: Solid, one caution. Legal on every measure. One chemical sits above the recommended health guideline.
| Chemical | Measured | Legal limit | Verdict |
|---|---|---|---|
| Chlorine byproducts | 53 ppb | 80 ppb | Caution |
| Total Dissolved Solids (TDS) | 580 mg/L | 1000 mg/L (taste standard) | Caution (taste standard) |
| Hardness (as CaCO3) | 210 mg/L (12.3 grains per gallon) | no health limit | Very hard |
| Hardness (as CaCO3) | 260 mg/L (15.2 grains per gallon) | no health limit | Very hard |
| Electrical Conductivity | 850 µS/cm | 1600 µS/cm (taste standard) | Caution (taste standard) |
| Chlorine byproducts (HAA5) | 18 ppb | 60 ppb | Good |
| Chlorine | 1.9 ppm | 4 ppm | Good |
| Lead | 2.4 ppb | 15 ppb | Good |
| Copper | 0.29 ppm | 1.3 ppm | Good |
| Arsenic | 2 ppb | 10 ppb | Good |
| Nitrate | 3.4 ppm | 10 ppm | Good |
| Fluoride | 0.5 ppm | 2 ppm | Good |
| Fluoride | 0.7 ppm | 2 ppm | Good |
| Total Dissolved Solids (TDS) | 420 mg/L | 1000 mg/L (taste standard) | Good |
| Chloride | 70 mg/L | 500 mg/L (taste standard) | Good |
| Chloride | 85 mg/L | 500 mg/L (taste standard) | Good |
| Sulfate | 35 mg/L | 500 mg/L (taste standard) | Good |
| Sulfate | 45 mg/L | 500 mg/L (taste standard) | Good |
| Alkalinity (as CaCO3) | 140 mg/L | none set | Good |
| Alkalinity (as CaCO3) | 130 mg/L | none set | Good |
| Electrical Conductivity | 650 µS/cm | 1600 µS/cm (taste standard) | Good |
How to read the verdicts: Good means the measurement sits under half of the federal legal limit. Caution means it is legal but at or above half the limit, the range where health researchers advise staying lower. Too high means it exceeded the legal limit. Taste standards are EPA secondary limits for taste and appearance. Hardness uses the USGS scale, where anything over 180 mg/L counts as very hard. When a utility blends water from wells and imported supplies, the same chemical can appear twice with each source's result.
4 measured results on file across every sampling period the EPA publishes.
Irvine Ranch Water District (PWSID CA3010092) has 1 violation in the EPA Safe Drinking Water Information System, 0 of them health-based.
Every chemical in the latest utility tests sits under the federal legal limit. One health-related chemical runs above the stricter health guideline, which is where a certified filter earns its place. Irvine Ranch Water District reports 0 health-based violations to the EPA.
Irvine Ranch Water District's most recent Lead and Copper Rule result, from the 2023 to 2025 monitoring period, found no detectable lead at the 90th percentile of tested homes. The federal action level is 0.015 mg/L, so the system result sits under it. Lead usually enters water from a home's own pipes and fixtures, so a single house can differ from the system figure.
The EPA record lists 1 violation for this system, 0 of them health-based. The rest are monitoring and reporting notes.
Irvine Ranch Water District serves about 450,323 people in Orange County and relies mainly on surface water. It is public water system CA3010092.
Text 949-414-9944 for a free water test. A local FilteredWTR tech screens the water at your own faucet for hardness, chlorine and sediment and explains each reading while you watch. The visit is free, and afterward the decision stays yours.
A local FilteredWTR tech screens the water at your faucet for hardness, chlorine and sediment and explains each reading while you watch. The visit is free, and afterward the decision stays yours.
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