Your WaterFlood and Stream ManagementWatershed and Environment

 Flooding in the Livermore-Amador Valley is nothing new.

 1938 -- Holmes Street at Arroyo Mocho1935_holmes_mocho.jpg in Livermore










Christmas Eve flooding in 1955 -- two years before Zone 7 was created in part to provide flood protection -- left much of northern Pleasanton, in the vicinity of where Hacienda Business Park now stands, under water.



The following two photos (courtesy of the Amador Livermore Valley Museum) were taken near Hopyard Road in Pleasanton during that same December 1955 storm.






1993 Arroyo Mocho, Pleasanton1993_mocho_ptown.jpg

More recent flooding, in 1998, occurred at El Charro Ranch, located between Pleasanton and Livermore.



Since its inception in 1957, Zone 7 has taken several steps to reduce flooding potential. Additional measures have been identified in the Agency's Stream Management Master Plan

To view Zone 7's main page for Flood Protection & Stream Management, click here.

Zone 7 requires an encroachment permit prior to activities or construction that will be conducted within the agency's property, easements, or rights-of-way. These permits help protect the region's water supply and flood control facilities, ensure the safety of nearby residents and passers-bys, and ensure that Zone 7's facilities are restored to their original condition. Zone 7's encroachment permit is separate from other city or public agency permits.

Zone 7 charges a permit processing fee of $50 for minor encroachments and $200 for major encroachments to cover administrative costs. Zone 7 may also charge applicants costs associated with project investigation, plan review and field inspections. Click here for permit guidelines and general provisions.

For most encroachment permits, please submit your completed encroachment permit application, required supporting documentation, and non-refundable permit fee to John Koltz at Zone 7 Water Agency, 100 North Canyons Parkway, Livermore, California 94551 or call him at (925) 454-5067 for additional information. Typically, Zone 7 issues permit within two to five working days, but permit issuance for projects requiring field inspections can take up to 20 working days.

For permits related to Zone 7 flood protection property, contact Jessica Traynor at the above address or at 925-454-5021.

Zone 7 Water Agency is the Administering Agency for Alameda County's "Water Wells Ordinance" (General Ordinance Number 0-2015-20) in Eastern Alameda County.

Any new well, well destruction, or well casing reconstruction (to extend, replace, or reperforate), including cathodic protection wells, must be permitted by Zone 7 before commencement of work. In addition, wells out of use for more than one year must either be permitted for destruction or reclassified as inactive by sending us a completed Zone 7 Statement of Future Well Use form.  

Also, any soil, soil vapor, or groundwater sampling project involving a temporary boring of ten feet or greater depth, including exploratory or remedial work, must be permitted by Zone 7 Water Agency.

How to Apply for a Drilling Permit

1.  Determine whether proposed project is within Zone 7's jurisdiction, which includes Dublin, Livermore, Pleasanton, Sunol, and all incorporated areas in eastern Alameda County, as shown on the Jurisdiction Map.

2.  Download and complete the Application for Drilling Permit.

3.  Add a sitemap showing proposed well or boring locations.

4.  For supply wells, additionally download and complete the Supply Well Supplemental Form. Types of supply wells include domestic, irrigation, livestock, municipal, dewatering, and industrial wells.

5.  Review standard well construction and well/borehole seal requirements outlined in Zone 7's drilling Permit Conditions.

6.  Permit fees are payable by check (made out to "Zone 7 Water Agency") or cash at Zone 7's administrative offices in Livermore. Credit cards and Paypal are not accepted at this time. See Drilling Permit Fee Schedule for appropriate amount.

7.  Application, sitemap, and payment must be received by Zone 7 Water Agency at least ten business days before proposed start date. Submit documents with attention to "Drilling Permits" as follows:

Zone 7 Water Agency
Attn:  Drilling Permits
100 North Canyons Parkway
Livermore, CA  94551-948

Documents may also be emailed to, however, a permit cannot be issued until the permit fees have been paid.

8.  Email Zone 7 at to schedule inspection at least 24 hours prior to drilling, and provide start time and phone number of your on-site representative.

9.  Within 60 days, submit a Well Completion Report on-line to DWR. In the field next to "Owner's Well Number", enter the owner's well number, if one exists, and state well number provided by Zone 7 in the drilling permit. Also, select "Zone 7 Water Agency - Alameda County Flood Control and Water Conservation District" from the "Local Permit Agency" pulldown menu. See Sample Completion Report for an example of a properly filled out Well Completion Report. Submit a copy of report to Zone 7 Water Agency.

10. For additional information, email or call 925-454-5000.

Permit Application 

Permit Documents and Tools