# Event Details - **Event Name**: Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages) - **Event Start and End Date**: Sat, 17 Oct, 2026 at 10:00 am – Sat, 17 Oct, 2026 at 02:00 pm (-07:00) - **Event Description**: Head to the Laguna Treatment Plant for a free, spooky open house. Learn all about the people, science, & equipment behind the scenes.About this EventThis is NOT registration for tours at Trick-or-Treatment. This is an RSVP for the general Open House. Please register for tours here: Free Halloween Open HouseThis Halloween, Santa Rosa Water is opening the doors (creaky noise) to the Laguna Treatment Plant for Trick-or-Treatment: Mysteries of the Laguna Treatment Plant, a free and spooky open house where the community can get a behind-the-scenes look at how wastewater is treated and learn more about the people, science and equipment that help keep our community healthy and our waterways clean and protected.Family-friendly costumes are encouraged. Please no pets at the event or left in cars at the event.Join Us for Spooktacular Activities for ALL AgesThere will be something for visitors of all ages, including spooky science, hands-on activities, equipment demonstrations, food, candy, giveaways and more. Costumes are encouraged!Admission to the open house is free, and no RSVP is required to attend.Guided Facility Tours (Ages 10+)Want to see more of what happens inside the treatment plant? Sign up for a tour.Guided facility tours will give visitors ages 10 and older a closer look at the wastewater treatment process and the facilities where it happens.Special-edition dungeon excursion. For this spooktacular event only, explore the underground of the plant. Requires attendees to walk up and down a flight of stairs.Tour registration is required in advance. Space is limited, so visitors interested in taking a tour are encouraged to reserve a spot early.For tour accommodations or special needs, please contact Jennifer Nesbit at 707-543-4546 or jnesbit@srcity.org.Tour DetailsRegister Here: Tours are available for ages 10 and older.Pre-registration is required.Tour spaces are limited.Closed-toe shoes are required.For safety, costumes should not impede your ability to see or walk safely.Tour registration is separate from general attendance at the open house. - **Event URL**: https://allevents.in/santa-rosa/trick-or-treatment-mysteries-of-the-laguna-treatment-plant-all-ages/100002002247932465 - **Event Categories**: fitness, science-fair - **Interested Audience**: - total_interested_count: 0 - **Event Highlights**: - Age Limit: All Ages - Duration: 4 hours - Location: Laguna Treatment Plant - Languages: English ## Ticket Details - **Ticket Price Range**: min: 0, max: 0, currency: USD ## Event venue details - **city**: Santa Rosa - **state**: CA - **country**: United States - **location**: Laguna Treatment Plant - **lat**: 38.3690429 - **long**: -122.7682317 - **full address**: Laguna Treatment Plant, 4300 Llano Road, Santa Rosa, United States ## Event gallery - **Alt text**: Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages) - **Image URL**: https://cdn-az.allevents.in/events3/banners/0f1f55109595bc997126b367c988833f938cddda72d7fad3d644a42bb934cc48-rimg-w1200-h600-dc082838-gmir.jpg?v=1790352970 ## FAQs - **Q**: When and where is Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages) being held? - **A:** Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages) takes place on Sat, 17 Oct, 2026 at 10:00 am to Sat, 17 Oct, 2026 at 02:00 pm at Laguna Treatment Plant, 4300 Llano Road, Santa Rosa, United States. - **Q**: Who is organizing Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages)? - **A:** Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages) is organized by Santa Rosa Water. ## Structured Data (JSON-LD) ```json [ { "@context": "https://schema.org", "@type": "Event", "name": "Trick-or-Treatment: Mysteries of the Laguna Treatment Plant (All Ages)", "image": "https://cdn-az.allevents.in/events3/banners/0f1f55109595bc997126b367c988833f938cddda72d7fad3d644a42bb934cc48-rimg-w1200-h600-dc082838-gmir.jpg?v=1790352970", "startDate": "2026-10-17T10:00:00-07:00", "endDate": "2026-10-17T14:00:00-07:00", "url": "https://allevents.in/santa-rosa/trick-or-treatment-mysteries-of-the-laguna-treatment-plant-all-ages/100002002247932465", "eventStatus": "https://schema.org/EventScheduled", "location": { "@type": "Place", "name": "Laguna Treatment Plant", "address": { "@type": "PostalAddress", "streetAddress": "4300 Llano Road", "postalCode": "95407", "addressLocality": "Santa Rosa", "addressRegion": "CA", "addressCountry": "US" }, "geo": { "@type": "GeoCoordinates", "latitude": "38.3690429", "longitude": "-122.7682317" } }, "eventAttendanceMode": "https://schema.org/OfflineEventAttendanceMode", "description": "Head to the Laguna Treatment Plant for a free, spooky open house. 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