Chromium-6 in Southern California Drinking Water: What You Need to Know

If you've received a notice about chromium-6 in your tap water, you're not alone. Thousands of homeowners across the Coachella Valley and Southern California are asking the same question: Is my water safe — and what can I do about it?

Here's what the science says, what local water agencies are doing, and how you can take control of your drinking water quality right now.

What Is Chromium-6?

Chromium is a naturally occurring metallic element found in the Earth's crust. In the Coachella Valley, trace amounts make their way into groundwater through the natural erosion of rocks and sediments. There are two primary forms:

• Chromium-3 (trivalent chromium): The most common form. Naturally occurring, non-toxic, and an essential human nutrient.

• Chromium-6 (hexavalent chromium): Formed from chromium-3 through weathering and natural chemical reactions over extended periods of time.

Chromium-6 is the form that has drawn public attention — and regulatory action.

What Are the Current Standards?

Water quality standards for chromium-6 have been evolving. Here's where things stand today:

• The federal drinking water standard for total chromium is 100 parts per billion (ppb).

• California's standard for total chromium is stricter at 50 ppb.

• In April 2024, California adopted a new Maximum Contaminant Level (MCL) of 10 ppb specifically for chromium-6 — the only chromium-6-specific drinking water standard in the nation. It became effective October 1, 2024.

The Coachella Valley Water District (CVWD) has reported an average chromium-6 level of 9.4 ppb across its wells, with a range of 0 to 22 ppb. About one-third of CVWD's 92 wells currently exceed the new 10 ppb limit. The state requires public notification whenever annual averages exceed this threshold.

Is Tap Water Safe to Drink?

According to CVWD, tap water can still be used for drinking, cooking, and all other household needs. The state regulates chromium-6 based on potential health impacts after many years (70+) of exposure — not for immediate health risks.

That said, California's new standard exists for a reason: long-term precaution. And with compliance costs exceeding $350 million for CVWD alone — and billions more expected statewide across 129 affected water systems — full remediation is a multi-year effort.

For many homeowners, waiting is simply not the preferred option.

Taking Control of Your Water Quality at Home

While local water agencies work toward compliance, you don't have to wait. Many Southern California homeowners are choosing to add an extra layer of protection right at the tap.

Reverse osmosis (RO) systems are one of the most effective technologies available for reducing chromium-6 — along with other contaminants like microplastics, PFAS, nitrates, and more. An RO system works by forcing water through a semi-permeable membrane that filters out dissolved contaminants before they ever reach your glass.

At SoCal Water Solutions, we've spent over 55 years helping homes and businesses across Southern California get the clean, great-tasting water they deserve. Whether you're on city water, well water, or surface water — we'll assess your specific situation and recommend the right solution for your home and budget.

👉 Schedule a free water consultation today and find out if a reverse osmosis system is the right solution for your home.

Frequently Asked Questions

Is chromium-6 in my water dangerous right now?

Not according to current public health guidance. The California MCL is set based on long-term exposure risk — not acute danger. However, many families choose not to wait and opt for home filtration for added peace of mind.

Does a standard water filter remove chromium-6?

Not always. Standard pitcher filters and carbon filters may not be effective against chromium-6. Reverse osmosis systems are among the most reliable options for reducing hexavalent chromium at the point of use.

How do I know if my home's water is affected?

If you live in the Coachella Valley or parts of Southern California, your water utility is required to notify you if your water exceeds the chromium-6 MCL. Testing for chromium-6 requires specialized laboratory equipment. SoCal Water can assist in coordinating with a local certified laboratory to determine if chromium-6 is a concern in your home.

What does SoCal Water Solutions offer? 

We offer residential and commercial water testing, reverse osmosis systems, water softeners, drinking water filters, and ongoing maintenance — all backed by over 55 years of combined experience serving Southern California.

Sources: Coachella Valley Water District (CVWD), California State Water Resources Control Board