That is a personal risk decision that informed households make differently, and respected buyers land on both sides. Below is the direct answer, the detail behind it, and exactly how to verify it for your specific situation.
Direct Answer
That is a personal risk decision that informed households make differently, and respected buyers land on both sides. The responsible approach is reviewing primary sources, starting with California DTSC's official Santa Susana Field Laboratory cleanup documentation, mapping the specific parcel's distance and topography relative to the site, reading available environmental studies, and deciding with the record in front of you rather than rumor in either direction.
Why this question matters
Ask about homes in the hills between Chatsworth, West Hills, and Simi Valley and the Rocketdyne question eventually surfaces. It is one of the region's most searched and least clearly explained topics, and buyers deserve a factual framework instead of forum threads.
The detail behind the answer
The Santa Susana Field Laboratory occupies roughly 2,850 acres in the Simi Hills, hosting rocket engine testing from the late 1940s and nuclear energy research in one portion of the site, including a partial reactor meltdown in 1959. The site is in a long running cleanup process overseen primarily by California's Department of Toxic Substances Control with Boeing, NASA, and the Department of Energy as responsible parties. The schedule and scope have evolved through litigation and agreements, which is why the current status should always be checked at DTSC directly rather than summarized from memory. On disclosure: California sellers must disclose known material facts, but standard Natural Hazard Disclosure reports do not cover industrial site proximity, so independent research is on the buyer.
How to verify
Read DTSC's official Santa Susana Field Laboratory pages for the current cleanup status, map the parcel's actual position relative to the site, ask whether your transaction's disclosure package includes an environmental database screen, and consider ordering one. My full SSFL disclosure buyer guide walks the complete framework.
What I tell clients
My job is not to make this decision for you. It is to make sure you decide with the primary record in front of you: the official cleanup documentation, the geography, and the disclosure facts. Buyers who do that homework make durable decisions in both directions, and neither one needs my opinion layered on top.
Frequently Asked Questions
What happened at the Santa Susana Field Lab?
The site hosted rocket engine testing for the space program from the late 1940s and nuclear research in one area, including a partial reactor meltdown in 1959 that was not publicly detailed for decades. Operations ended in the late twentieth century and the site entered a long term regulated cleanup.
Is the cleanup finished?
Cleanup is a multi phase, multi party process that has progressed over years with evolving agreements and ongoing public debate over standards and schedule. Check DTSC's official Santa Susana Field Laboratory page for the status current at the time you are buying.
Do sellers have to disclose proximity to the site?
California sellers must disclose known material facts affecting value or desirability, which can include environmental concerns they actually know about. Standard NHD reports do not specifically cover industrial site proximity, so buyers should research independently and ask whether their transaction includes an environmental database screen.
Which neighborhoods are closest to the site?
The site sits in the Simi Hills between the Simi and San Fernando valleys, with Box Canyon, Santa Susana Knolls, and the western edges of Chatsworth and West Hills among the nearest communities. Distance and topography vary meaningfully by parcel, which is why mapping the specific address matters.
