Plumbing Newark

Newark plumbing on desalinated water and pipes from the tract years

Newark's plumbing sits between two Tri-City agencies and one small permit office. Alameda County Water District serves the tap, partly from its desalination plant near Cherry Street and Central Avenue, and owns the pipe only through the meter. Union Sanitary District carries the sewage to its plant in Union City, while the owner keeps the lateral right up to the main. The city's Building Inspection Division permits repipes and water heater swaps by email, without drawings.

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  • Rules on this page checked against 19 public sources, October 2026

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Free to request, and you agree the scope and price with the person you hire before work starts. In California, a job over $1,000 in labor and materials, or one that needs a building permit, must be done by a contractor licensed by the CSLB in the right class. Ask for the license number and check it at cslb.ca.gov.

Before you hire

Before a Newark plumber opens a wall or a trench

  1. Will you email Newark's permit application yourself, and who signs and returns the issued permit before the first inspection?
  2. For a lateral, will you pull USD's repair permit and, if the trench reaches the street, Newark's encroachment permit?
  3. Will the new gas piping get its rough inspection before the walls close and its pressure test before appliances go on?
  4. Can you confirm our service line material on ACWD's inventory map before quoting a repipe?
  5. Is your C-36 Plumbing license current on cslb.ca.gov, and can you show USD your workers' compensation and liability certificates?
Water supplier
ACWD, with its desalination plant near Cherry St and Central Ave
Sewer agency
Union Sanitary District; Newark's own treatment plant closed in 1981
Homes built 1960-1979
53 percent, per Newark's 2023-2031 Housing Element
Permit office
Building Inspection Division, Public Works; permits by email
The Silliman Activity and Family Aquatic Center in Newark
The Silliman Activity and Family Aquatic Center in Newark. Photo: LPS.1, CC0, via Wikimedia Commons.

The houses here

Two decades of tract building, and pipes of the same age

Newark's 2023-2031 Housing Element dates 53 percent of the city's homes to the years 1960 to 1979 and counts 70 percent of them as detached single-family houses, so a large share of the city's original plumbing went in during those two decades. The same document names Mirabeau Park and Old Town/Central Newark as holding some of the oldest housing in the city. ACWD's guidance for those streets is plain: a house built before 1960 likely has a galvanized steel service line, steel that corrodes underground and may begin to leak once it reaches 40 or 50. The district's service line inventory lists the other materials a Newark line can turn out to be: copper, polyethylene, polybutylene or PVC.

The work

Newark plumbing work and the paperwork behind each job

  1. Repiping a 1960s or 1970s house

    Newark's Building Inspection Division lists re-piping an existing residence among the residential jobs that need no plans, along with water heater replacements. A permit is still required: the division's permit requirements brochure names the replacement of existing piping systems as permit work. The plumber or owner emails the application, pays the invoice that comes back, then signs the issued permit and returns it by email before any inspection can be booked.

  2. Gas lines for a range, dryer or barbecue

    Newark's fuel gas handout requires a plumbing permit before gas piping is installed, altered or repaired. Buried exterior pipe is inspected once, in the open trench and under pressure. Piping inside a building is inspected twice: a rough inspection before anything is covered or an appliance attached, then a final pressure test once the building is enclosed. The handout also wants an accessible shutoff valve for every appliance, in the same room and no more than three feet from it.

  3. A broken lateral under the front yard or the street

    Union Sanitary District holds the owner responsible for the lateral all the way to the public main and requires its own repair permit before any digging, even when the break is entirely on private property. USD issues that permit to whoever does the underground work, after fees and a city building permit are shown, and asks no plan submittal when less than 100 feet of new lateral is involved. The contractor must show a current California license, workers' compensation and general liability coverage naming the district.

  4. Finding a leak before the plumber arrives

    ACWD's leak page suggests closing the house shutoff overnight and checking usage in its My Smart Water Connect portal the next day, since its meters report remotely. Usage while the valve was closed points to a leak outside; none points inside the house. A warm or hot spot on the floor together with a rising gas bill can mean a broken hot water line. ACWD calls toilets the leading source of indoor leaks and gives away dye tablets to test them.

Permits and local rules

What Newark, USD and ACWD each require before work starts

  • Newark Building Inspection Division

    All Newark permits are now issued electronically, and plan check status shows on the city's eTRAKiT site. The division lists the residential applications that usually need no plans: water heater replacements, electrical service upgrades, re-piping an existing residence, minor electrical work and replacement HVAC equipment in its existing location. Its FAQ adds that a building permit can be issued only to the property owner or a properly licensed contractor, and that Newark issues no physical job cards.

    Source: City of Newark Building Inspection Division (newarkca.gov)

  • What Newark lets you do without a permit

    The division's permit requirements brochure exempts clearing stoppages in waste or soil piping, the repair, removal or reinstallation of a toilet, and repairing leaks in drains, water, waste or vent pipe and valves. Once a concealed pipe or valve is defective and has to be replaced with new material, the brochure treats it as new work that needs a permit. A permit also lapses if work does not start within 180 days or stops for 180 days.

    Source: City of Newark Building Inspection Division (newarkca.gov)

  • USD Ordinance No. 34 and the repair permit

    USD maintains the public sewer mains across Fremont, Newark and Union City, more than 839 miles of pipe, and under its Ordinance No. 34 each owner maintains the lateral from the house to the main, the stretch under the sidewalk and street included. Repairs must meet USD's Standard Specifications, which the district says protect its system from poorly built sewers that cause backups and overflows. Digging in the street also takes an encroachment permit from the city.

    Source: Union Sanitary District (unionsanitary.ca.gov)

State license for this work: C-36 Plumbing, C-42 Sanitation System. Look up a contractor's license on the CSLB website (cslb.ca.gov).

Part by part

Parts of Newark where the pipes are oldest

  • Old Town/Central Newark and Mirabeau Park

    The Housing Element maps a concentration of substandard housing conditions here from 2018 on, in some of the oldest homes in the city, and says Newark's repair program outreach will focus on these neighborhoods. Houses here that predate 1960 are the ones ACWD expects to have galvanized service lines.

  • The Lake

    Transamerica Development Co. filed the plan in March 1965 for 770 ranch homes around an eighteen-acre freshwater lake, and the first ones were occupied by Thanksgiving 1966. ACWD says galvanized pipes installed in the 1960s or earlier and never replaced are likely nearing the end of their lifespan; a household magnet sticks to galvanized steel and not to copper.

Timing

Fitting a Newark permit and inspection into the week

Newark's Building Inspection counter is open to the public from 8 a.m. to 2 p.m., Monday through Thursday and every other Friday, and city offices close on the alternate Fridays. An emailed application that arrives before 4 p.m. may be processed the day it comes in, and can take up to one business day; later ones roll to the next business day. Inspections are requested by email with the type of inspection, an onsite contact and a preferred date and morning or afternoon window. USD separately asks for 48 hours' notice before its sewer inspector comes.

Questions

Plumbing questions Newark homeowners ask

Is the tap water in Newark desalinated?

Partly. ACWD's Newark Desalination Facility, in service since September 2003, treats brackish groundwater by reverse osmosis, and the district blends that water with local groundwater for a more balanced mineral content before it reaches customers in and around Newark; chlorinated well water is added to raise its hardness. Parts of Newark instead receive a blend of San Francisco water and well water from ACWD's Blending Facility.

Will I get a job card to post for my Newark plumbing permit?

No. Newark does not issue physical job cards. Inspection results are emailed after each inspection to whoever was named as the onsite contact, and the permit history of a property can be searched on eTRAKiT or requested from the division by email with the address.

Where can I get rid of cooking grease in Newark instead of pouring it down the sink?

Union Sanitary District and Republic Services run a free drop-off for residential cooking oil and grease at Republic's site at 42600 Boyce Road in Fremont, Monday through Friday from 8 a.m. to 5 p.m. Bring it in a sealed container. USD's reason is simple: grease flows while hot, then hardens in sewer pipes and can back up the line.

Do I need a Newark permit to fix a running toilet or a dripping valve?

Usually not. The Building Inspection Division's brochure exempts repairing, removing or reinstalling a toilet, clearing stoppages, and repairing leaks in pipes and valves. The exemption ends when a concealed pipe or valve has failed and must be replaced with new material, which the brochure counts as new work needing a permit.

Are flushable wipes safe for a Newark sewer lateral?

USD says to put all personal care and baby wipes in the trash, including ones labeled flushable, because they do not break down like toilet paper and can block both your lateral and the district's mains. The owner pays to clear a lateral, so a blockage from wipes is a repair bill that stays with the house.

Where these facts come from

Checked against these public sources in October 2026. Rules and programs change: confirm permit requirements with the city before work starts, and a contractor's license on the CSLB website.

  • newarkca.gov: building inspection division (newarkca.gov)
  • newarkca.gov: applying for a permit (newarkca.gov)
  • newarkca.gov: faq s (newarkca.gov)
  • newarkca.gov: 636504125213900000 (newarkca.gov)
  • newarkca.gov: 637407947943430000 (newarkca.gov)
  • static1.squarespace.com: Newark+2023 2031+Housing+Element compliant December 2023
  • history.newarkca.gov: the lake 717 (history.newarkca.gov)
  • unionsanitary.ca.gov: sewer repairs (unionsanitary.ca.gov)
  • unionsanitary.ca.gov: frequently asked questions (unionsanitary.ca.gov)
  • unionsanitary.ca.gov: sewer repairs replacements additions (unionsanitary.ca.gov)
  • unionsanitary.ca.gov: mission organization facts and history (unionsanitary.ca.gov)
  • unionsanitary.ca.gov: residential fats oils and grease (unionsanitary.ca.gov)

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