California Well Water Testing and Treatment Contractors

Find qualified Well Water Testing and Treatment contractors in California using our contractor lookup tool. Learn more about NGWA Contractor Certifications here.

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McDannald Pump Systems

Contractors Company
29963 Anthony Road
Valley Center, CA 92082
United States
(760) 741-5555

Water Wise Well Service

Contractors Company
PO Box 3514
Ramona, CA 92065
United States
(760) 789-7551

Ransom Pump PM LLC

Contractors Company
PO Box 206
Ramona, CA 92065-0206
United States
(760) 789-5955

Superior Pump and Drilling

Contractors Company
PO Box 1551
Fort Bragg, CA 95437-1551
United States
(707) 964-9511

J & J Pumps

Contractors Company
4952 South Barney Road
Anderson, CA 96007
United States
(530) 222-3393

Paul Dierkop

Contractor Individual
1884 coronado view
Alpine, CA 91901
United States

Specialized Drilling Corp

Contractors Company
2022 Callisto Terr
Chula Vista, CA 91915
United States

Fisch Drilling & Pump Inc

Contractors Company
3150 Johnson Rd
Hydesville, CA 95547
United States
(707) 768-9800

Mathew McQuoid

Contractor Individual
PO Box 503
Fort Jones, CA 96032
United States
(530) 468-5378

Mathew McQuoid

Contractor Individual
PO Box 503
Fort Jones, CA 96032
United States
(530) 468-5378

Rich Well Drilling & Pump Service

Contractors Company
1251 Railroad Dr
McKinleyville, CA 95519-3507
United States
(707) 839-1087

Frequently Asked Questions

When should I have my well water tested?

The National Ground Water Association (NGWA) recommends well owners test their water at least annually for bacteria, nitrates, and any contaminants of local concern. More frequent testing should be considered if:

  • There is a change in the taste, odor, or appearance of the well water, or if a problem occurs such as a broken well cap, inundation by floodwaters, or a new contamination source
  • The well has a history of bacterial contamination
  • The septic system has recently malfunctioned
  • Family members or house guests have recurrent incidents of gastrointestinal illness
  • An infant is living in the home, or
  • To monitor the efficiency and performance of home water treatment equipment.

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What can impact groundwater quality?

Forty-seven percent of the United States depend on groundwater for their basic drinking water supply. Having a basic understanding about groundwater quality will help ensure that your well is supplying potable water for your household.

Along with human activities, water quality is affected by a combination of natural processes. Most relate to chemical compositions underground. However, other factors such as biological, physical, and radiological conditions can affect water quality as well.

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How is a well disinfected?

Properly constructed and maintained water well systems are designed to keep microorganisms such as bacteria, viruses, and protozoa from getting inside the well system and into the water. When a water test indicates the presence of microorganisms in a well, disinfection of the well system is recommended along with some level of inspection.

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California Groundwater and Water Well Statistics

Few states can accurately or confidentially determine how many residential wells are in place. For each region, the American Housing Survey by the U.S. Census provides regional data.

California is found in the West, along with these other states: Alaska, Hawaii, Washington, Oregon, California, Idaho, Utah, Nevada, Arizona, New Mexico, Colorado, Wyoming, and Montana.

The last American Housing Survey Census indicates this region had 1,540,0002 households served by residential wells, with an average of 2.973 persons per household. The USGS estimates the population of self-supplied water supply users in California to be 1,440,000 for which groundwater is 85% of their water source.

  • 2,081 community water systems use groundwater for 7,286,000 people
  • 1,393 non-community, non-transient water systems use groundwater for 371,400 people
  • 2,874 non-community, transient water systems use groundwater for 603,200 people
  • 59,500 irrigation wells used serving 23,600 farms and 3,860,000 acres

Well Water Testing and Treatment Articles and Resources

Does My Water Well Need Treatment? By Gary L. Hix, R.G., CWD/PI Have you ever asked yourself: “Does my well water need treatment?” The question is not one you can answer if you have not had your water tested recently. You should ask yourself instead: “When was the last time I had my water tested?” If the answer to this question […]

PFAS and Private Well Owners: What You Need to Know NGWA published PFAS and Private Well Owners: What You Need to Know, a two-page fact sheet for home owners concerned about PFAS. Written in easy-to-understand language by groundwater professionals, it explains what PFAS are, how to test wells for PFAS, treatment options, and more.