The more you know about your well, the better you can protect your water.
Understanding your water system helps you maintain its health, longevity, and safety. Below are trusted resources from California state agencies, national water experts, and local organizations to help you make informed decisions about your well and water quality.
This page explains the different types of wells in California and how they’re regulated. It’s a great place to start if you want to understand groundwater basics, well construction standards, and statewide water management efforts.
This downloadable guide covers how wells work, common maintenance tips, and what to test for to ensure your water remains safe. It’s a practical, detailed handbook for any California well owner.
This resource focuses on drinking water wells and what you should know about protecting your water from contamination. It includes information on drought impacts, groundwater quality, and private well responsibilities.
Developed by the National Ground Water Association, this site offers educational articles, videos, and maintenance advice for private well owners. It’s an excellent general resource for learning how to care for your system year-round.
Mariposa County’s official water well page includes local permit requirements, testing expectations, and inspection procedures. It’s especially relevant if you live or plan to drill within Mariposa County.
The EPA provides national guidance on well water safety, including how to prevent contamination and what to do if you suspect pollution. It’s a vital source for understanding well stewardship from a federal perspective.
This county document outlines the technical standards for well drilling, casing, and sealing in Mariposa County. Reviewing this can help homeowners ensure their contractor follows local health and safety requirements.
A local Mariposa business providing water hauling and bulk transport services—useful for homeowners with low-producing wells or during drought conditions.
This nonprofit organization supports Central Valley communities with emergency water services, well repairs, and long-term water sustainability solutions. A valuable resource for those experiencing well failure or water shortages.