How many projects has Sonoma County American Water Treatment Inc undertaken?

Sonoma County American Water Treatment Inc has pulled 56.0 building permits since 1996.

Does Sonoma County American Water Treatment Inc carry a valid contracting license?

Sonoma County American Water Treatment Inc currently holds license 1028815, 345594 (Water Conditioning), which was Active when we last checked.

Sonoma County American Water Treatment Inc

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Sebastopol

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Updated: Jun 18, 2026

Sonoma County American Water Treatment HVAC/Mechanical Contractor

Sonoma County American Water Treatment Inc, 708 Gravenstein Hwy N, Sebastopol, CA (Employees: Colton Chapin Williams, Donna E Pantzer, and Gerald Marvin Gromer) holds a Water Conditioning license and 1 other license according to the California license board.

Their BuildZoom score of 97 ranks in the top 18% of 336,931 California licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring Sonoma County American Water Treatment Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.

Building Permits by Sonoma County American Water Treatment Inc

Sort by: Notable Notable | Date Date | Job Value Job Value

This is a sample of this contractor's permits. Click here to access their complete permit history.

Encroachment - sidewalk sewer water monitoring wells misc

49 Woodworth Way, Petaluma, CA, 94952

2025-08-28

Upgrade water meted to 1”

Valuation:

Permit #:

PWEP-2025-0398

Status:

canceled

Fee:

Permit Type:

N/A

Building Type:

N/A

Ab-enc aap: annual agency permit

1 Countywide, Countywide, CA

2014-12-30

Bore under and excavate along and across various county roads for installing water services making emergency water repairs and for ordinary maintenance of its facilities. no main line extensions or replacements is permitted

Valuation:

Permit #:

ENC14-0301

Status:

ISSUED

Fee:

$893

Permit Type:

N/A

Building Type:

N/A

Ab-enc utb: utility boring

1 Countywide, Countywide, CA

2014-07-02

Excavate in the pavement and off the pavement along todd rd and east railroad ave to install anodes and well test stations as per attached county standards. todd rd:.02 miles west of ghilotti ave. east railroad ave: 73 miles east of old redwood hwy. located in santa rosa and penngrove. ely rd is on private property

Valuation:

Permit #:

ENC14-0179

Status:

ISSUED

Fee:

$1,369

Permit Type:

N/A

Building Type:

N/A

Ab-enc aap: annual agency permit

1 County Right Of Way, Countywide, CA

2014-04-15

Bore under and excavate along and across various county roads for making emergency sewer repairs and for ordinary maintenance of its facilities. no main line extensions or replacements is permitted. applicant to apply for a seperate encroachment permit once the repair is is done

Valuation:

Permit #:

ENC08-0290

Status:

EXPIRED

Fee:

$317

Permit Type:

N/A

Building Type:

N/A

Ab-enc utw: utility water

1 County Right Of Way, Countywide, CA

2014-04-15

This permit is for bid purposes only. for a project to: excavate and replace existing air valves at railroad avenue and arbor ave and railroad ave and boyes blvd. as per attached plans titled water transmission system air valve upgrade project phase 1 prepared by sonoma county water agency located in sonoma

Valuation:

Permit #:

ENC08-0063

Status:

EXPIRED

Fee:

$202

Permit Type:

N/A

Building Type:

N/A

Ab-enc aap: annual agency permit

1 County Right Of Way, Countywide, CA

2014-04-15

Excavate and reconstruct the county right-of-way per county standards to perform emergency work to install service connections and to perform ordinary maintenance of existing facilities at various locations within the sonoma county water agency's sewer districts. all work is subject to county notification and inspection. (see attached standard and special conditions.)

Valuation:

Permit #:

ENC10-0006

Status:

EXPIRED

Fee:

$445

Permit Type:

N/A

Building Type:

N/A

Encro pw: public works

2150 W College Ave, Santa Rosa, CA, 95401

2014-07-15

Remove and replace sidewalk per city standards. remove and replace sidewalk per city standards 235 and 237. pedestrians shall be safely escorted through the workzone or diverted around the workzone in accordance with mutcd ta-28. contact inspector 48 hours prior to start of work

Valuation:

Permit #:

EP14-0157

Status:

ISSUED

Fee:

$140

Permit Type:

N/A

Building Type:

N/A

Ab-enc aap: annual agency permit

1 Countywide, Countywide, CA

2013-12-20

Valuation:

Permit #:

ENC13-0367

Status:

ISSUED

Fee:

$1,264

Permit Type:

N/A

Building Type:

N/A

Ab-enc bid: created for bid purposes

1 Countywide, Countywide, CA

2012-10-23

This permit is for bid purposes only: to excavate in the pavement to install a 14 and16 water line along: ramal rd. as per attached county standards and attached plans titled sonoma valley county sanitation district north bay water refuse program napa salt marsh restoration pipeline volume 2 of 2 prepared by cdm smith engineering. 00-.14 miles west of the napa county line.located in ... see more

Valuation:

Permit #:

ENC12-0367

Status:

ISSUED

Fee:

$429

Permit Type:

N/A

Building Type:

N/A

Ab-enc aap: annual agency permit

1 Countywide, Countywide, CA

2012-12-18

Excavate and reconstruct the county right-of-way per county standards to perform emergency work to install service connections and to perform ordinary maintenance of existing facilities at various locations. all work is subject to county notification and inspection. (see attached standard and special conditions.) pcas # ec124097

Valuation:

Permit #:

ENC12-0497

Status:

ISSUED

Fee:

$1,264

Permit Type:

N/A

Building Type:

N/A

Ab-zpe ag03: nursery/landscape materl

6676 Petaluma Hill Rd, Santa Rosa, CA, 95404

2012-08-07

Zoning permit for importation of material for composting request for a zoning permit with posting to allow for the importation of 10, 000 cubic yards of sediment and other materials from water agency flood control channels to use for composting at existing wholesale nursery for usein nursery operations (not for sale as compost) on two parcels totaling 48.43 acres. an eir which include... see more

Valuation:

Permit #:

ZPE12-0292

Status:

PAID

Fee:

$6,264

Permit Type:

N/A

Building Type:

N/A

Ab-enc aap: annual agency permit

1 Test St, Countywide, CA

2011-12-06

Excavate and reconstruct the county right-of-way per county standards to perform emergency work to install service connections and to perform ordinary maintenance of existing facilities at various locations. all work is subject to county notification and inspection. (see attached standard and special conditions.) pcas # 3301-000

Valuation:

Permit #:

ENC11-0417

Status:

ISSUED

Fee:

$1,215

Permit Type:

N/A

Building Type:

N/A

Ab-enc mis: miscellaneous

1 County Right Of Way, Countywide, CA

2014-04-15

Conduct traffic control along madrone road while installing a new 27 water main on private property as per enclosed sonoma county water agency plans eldridge-madrone pipeline dated july 2003

Valuation:

Permit #:

ENC03-0340

Status:

EXPIRED

Fee:

$154

Permit Type:

N/A

Building Type:

N/A

C-cpp ms99: miscellaneous

5200 Slusser Rd, Santa Rosa, CA, 95403

2013-03-15

Use permit and design review for solar arrays request for a use permit and administrative design review for a new commercial solar array to produce up to 20 megawatts of electricty on various county owned parcels

Valuation:

Permit #:

PLP13-0005

Status:

REF_SENT

Fee:

$13,174

Permit Type:

N/A

Building Type:

N/A

Ab-enc bid: created for bid purposes

1 County Right Of Way, Countywide, CA

2011-05-11

This permit is for bid purposes only. for a project to: excavate and install an 8 sewer main along: rose meadow ct rose bud ct liana dr leo dr south wood dr westwood dr and biwana dr as per attached plans titled south park county sanitation district biwana drive collection system replacement project prepared by sonoma county water agency located in santa rosa

Valuation:

Permit #:

ENC09-0080

Status:

FINALED

Fee:

$212

Permit Type:

N/A

Building Type:

N/A

Ab-enc bid: created for bid purposes

1 Test St, Countywide, CA

2011-05-27

This permit is for bid purposes only. for a project to: excavate and install an 30 sewer main along east watmaugh rd san luis rd and splude rd as per attached plans titled sewer trunk main replacement (watmaugh rd east to treatment plan) prepared by sonoma county water agency inc located in sonoma

Valuation:

Permit #:

ENC09-0036

Status:

FINALED

Fee:

$212

Permit Type:

N/A

Building Type:

N/A

Encro pw: public works

40 W Barham Ave, Santa Rosa, CA, 95407

2013-08-30

Install new anode well rectifier and new service utility panel. remove and replace sidewalk per city standards 235 and 237. contact inspector 48 hours prior to start of work

Valuation:

Permit #:

EP13-0172

Status:

ISSUED

Fee:

$140

Permit Type:

N/A

Building Type:

N/A

C-use ms01: conference/retreat/centr

9560 Westside Rd, Forestville, CA, 95436

2013-05-10

Use permit for education center request for a use permit for a new education center to consist of 5, 000 sq ft classroom building and new parking area with landscpaing on a 10.62 acre parcel

Valuation:

Permit #:

UPE13-0037

Status:

REF_SENT

Fee:

$10,987

Permit Type:

N/A

Building Type:

N/A

Ab-enc dr: driveway

15850 Rockpile Rd, Geyserville, CA, 95441

2012-08-14

Construct new driveway approach to county standards on rockpile rd. 6.8 miles west of stewarts point skaggs springs rd. located in healdsburg. see attached drawing for guard rail detail

Valuation:

Permit #:

ENC12-0362

Status:

ISSUED

Fee:

$1,018

Permit Type:

N/A

Building Type:

N/A

Ab-enc uts: utility sewer

1253 S Wright Rd, Santa Rosa, CA, 95407

1996-02-29

Excavate and install sewer facilities along and across s wright rd west of santa rosa from miles ave south for approximately 700 as per attached plans of the south wright rd sewer improvements for the sonoma county water agency prepared by coastland civil engineering inc

Valuation:

Permit #:

ENC96-0023

Status:

STARTED

Fee:

Permit Type:

N/A

Building Type:

N/A

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Verified License

License #	1028815
Status	Active
State	California
Type	Water Conditioning
Business Type	Corporation

BuildZoom verified this license was active as of March 2026.

Verify this license's status for Sonoma County American Water Treatment Inc at the California Contractors State License Board.

This is a sample of licensing data; click here to access a complete history.

Inactive License

License #	345594
Status	Inactive
State	California
Type	Water Conditioning
Business Type	Corporation

According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.

Check this license's status for Sonoma County American Water Treatment Inc at the California Contractors State License Board.

This is a sample of licensing data; click here to access a complete history.

97

BuildZoom Score

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Insured

Insurer	Farmers Insurance Exchange
Insured up to	$1,000,000

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Bonded

Bonded Agent	American Contractors Indemnity Company
Bond Value	$15,000

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Insured

Workers Comp Provider

Technology Insurance Company Inc

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56

Permits

Building permit records show that Sonoma County American Water Treatment Inc has worked on 56 permitted projects.

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Sonoma County American Water Treatment

Location and Projects

Sonoma County American Water Treatment HVAC/Mechanical Contractor