Frequently Asked Questions
Everything you need to know about septic systems, percolation testing and ADEQ permits in Arizona.
English FAQ
How long does a percolation test take in Arizona?
At Diaz Environmental, we average 3–5 business days from soil testing to design and permit submission — one of the fastest turnarounds in Maricopa County. We own our own excavation equipment which eliminates subcontractor delays.
Do I need a percolation test to build a house in Arizona?
Yes. If your property is not connected to a municipal sewer system, Arizona requires a percolation test and ADEQ-approved septic design before you can get a building permit. This applies to most rural and semi-rural areas in Maricopa, Pinal, Pima, Yavapai and Coconino Counties.
What areas of Arizona do you serve?
We serve all of Maricopa, Pinal, Pima, Yavapai and Coconino Counties — including Phoenix, Scottsdale, Mesa, Chandler, Gilbert, Queen Creek, San Tan Valley, Cave Creek, Anthem, New River, Wickenburg, Buckeye, Goodyear, Fountain Hills, Rio Verde and all Native Nations.
What is included in your septic system design service?
Our full service includes site evaluation, soil testing, percolation testing, ADEQ-compliant system design, and permit submission to your county. We do all of this in-house with our own equipment — no subcontractors needed.
Do you offer services in Spanish?
Yes — we are fully bilingual. We serve Arizona's Spanish-speaking community with the same level of expertise and professionalism in both languages.
How much does a septic system design cost?
Pricing depends on lot size, soil conditions and the type of system required by ADEQ. Contact us at (602) 812-8609 for a free quote — we respond the same day.
Preguntas Frecuentes en Español
¿Cuánto tiempo tarda una prueba de percolación en Arizona?
En Diaz Environmental, promediamos de 3 a 5 días hábiles desde la prueba de suelo hasta el envío del permiso. Contamos con nuestro propio equipo de excavación, lo que elimina las demoras de subcontratistas.
¿Necesito una prueba de percolación para construir una casa en Arizona?
Sí. Si tu propiedad no está conectada al sistema de alcantarillado municipal, Arizona requiere una prueba de percolación y un diseño séptico aprobado por ADEQ antes de obtener un permiso de construcción.
¿Qué áreas de Arizona atienden?
Atendemos todos los condados de Maricopa, Pinal, Pima, Yavapai y Coconino, incluyendo Phoenix, Scottsdale, Queen Creek, San Tan Valley, Cave Creek, Anthem, New River, Wickenburg y todas las Naciones Nativas.
¿Cuánto cuesta el diseño de un sistema séptico?
El precio depende del tamaño del terreno, las condiciones del suelo y el tipo de sistema requerido por ADEQ. Llámanos al (602) 812-8609 para una consulta gratuita — respondemos el mismo día.
Still have questions? / ¿Más preguntas?
Call (602) 812-8609 — same day response guaranteed.
Contact Us / Contáctanos