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Emergency Plumbers in Monrovia, CA (2026)

Top 50 of 1,328 plumbers, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 plumbers on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

Burst pipe or major leak: shut off the main water valve first. If water reaches outlets or the panel, stay clear and call 911.

The short answer

  1. 1

    #1 for emergency plumbing in Monrovia: Western Rooter & Plumbing, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency plumbers in Monrovia at a glance

Top emergency plumbers in Monrovia at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Western Rooter & Plumbing664.9★ (1,562)Arcadia, 2 mi away24/7
2Merry Plumbing645.0★ (652)San Marino, 6 mi away24/7
3Hassle Free Plumbing644.9★ (266)Monrovia24/7
4Drainflow Solutions & Plumbing645.0★ (276)Duarte, 2 mi away24/7
5Roto-Rooter Plumbing & Water Cleanup634.9★ (736)Pasadena, 8 mi away24/7
6Top Notch Plumbing Inc.635.0★ (515)Covina, 8 mi away24/7
7Roto-Rooter Plumbing & Water Cleanup634.8★ (1,128)Alhambra, 10 mi away24/7
8High Speed Plumbing of Arcadia634.9★ (182)Arcadia, 2 mi away24/7
9Drain Great Plumbing Services635.0★ (94)Monrovia24/7
10Rooter Hero Plumbing & Air634.9★ (1,637)Pomona, 16 mi away24/7

Call an emergency plumber in Monrovia now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency plumbers in Monrovia, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 1,328 is on the plumbers page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  2. #2 Merry Plumbing

    Based in San Marino, 6 mi away

    64/100CR Score

    Ranked #2 because of its Google rating and trade focus: 5.0★ from 652 Google reviews, listed on Google as “Plumber”.

    • 5.0★ from 652 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1465 San Marino Ave, San Marino, CA 91108
    View profile for Merry Plumbing(626) 414-5583

  14. #14 Courtesy Plumbing

    Based in Covina, 8 mi away

    62/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.8★ from 387 Google reviews, listed on Google as “Plumber”.

    • 4.8★ from 387 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    601 E Edna Pl, Covina, CA 91723
    View profile for Courtesy Plumbing(626) 967-5655

  22. #22 JB Plumbing

    Based in San Dimas, 11 mi away

    61/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.8★ from 396 Google reviews, listed on Google as “Plumber”.

    • 4.8★ from 396 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    515 W Allen Ave #13, San Dimas, CA 91773
    View profile for JB Plumbing(909) 592-8487

  24. #24 The Sewer Company

    Based in Pasadena, 9 mi away

    61/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.9★ from 215 Google reviews, listed on Google as “Plumber”.

    • 4.9★ from 215 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    21 Miller Alley, Pasadena, CA 91103
    View profile for The Sewer Company(626) 900-1815

Top 50 of 1,328 plumbers by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

plumbers in Monrovia, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Roto-Rooter Plumbing & Water Cleanup614.9★ (375)12 mi
27Service Lion Plumbing Heating Air Electric614.7★ (1,173)17 mi
28Advantage Plumbing & Rooter615.0★ (305)14 mi
2924 Rooter & Plumbing, Inc.615.0★ (346)15 mi
30Dymek's Freedom Plumbing, Inc615.0★ (1,063)22 mi
31High Speed Plumbing614.8★ (542)15 mi
32LionHeart Plumbing Glendora614.9★ (39)1 mi
33Mr. Rooter Plumbing of Long Beach614.9★ (1,140)21 mi
34Roto-Rooter Plumbing & Water Cleanup614.9★ (417)15 mi
35Service Squad614.9★ (131)8 mi
36SWE Sewer Solutions Construction & Engineering614.9★ (120)8 mi
37I Love Sewers Rooter And Plumbing Sewer Specialties Inc614.9★ (200)11 mi
38Katty's Plumbing Arcadia615.0★ (41)2 mi
39Option One Plumbing614.8★ (3,017)25 mi
40Water Heaters Only, Inc.614.9★ (720)18 mi
41John's Plumbing & Drain Services614.9★ (383)15 mi
42Olson Superior Plumbing Santa Fe Springs614.9★ (272)13 mi
43Jerez Plumbing | Emergency Plumber, Hydrojetting, Drain Cleaning, and Tankless Water Heater Repair in La Puente, CA615.0★ (92)8 mi
44JG Plumbing & Rooter Inc605.0★ (77)7 mi
45Do It Right Plumbers604.8★ (1,980)24 mi
46Century Rooter Service And Plumbing604.7★ (29)In Monrovia
47Goodwill Plumbing & Drain Inc605.0★ (27)2 mi
48Martinez Plumbing604.9★ (53)5 mi
49Service Hero Plumbing, HVAC, and Electrical604.8★ (1,506)8 mi
50Biard & Crockett Plumbing, Heating, and Air Conditioning604.9★ (1,715)25 mi

How we ranked emergency plumbers in Monrovia

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency plumbers in Monrovia: questions

Which plumbers in Monrovia are open 24/7?

25 on this list post 24/7 hours, including Western Rooter & Plumbing, Merry Plumbing, Hassle Free Plumbing, Drainflow Solutions & Plumbing and Roto-Rooter Plumbing & Water Cleanup.

Who is ranked #1 for emergency plumbing in Monrovia, CA?

Western Rooter & Plumbing is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency plumbers in Monrovia ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the plumber arrives?

Burst pipe or major leak: shut off the main water valve first. If water reaches outlets or the panel, stay clear and call 911.

How many emergency plumbers here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Monrovia

  1. October 2026: CR Scores recalculated for 1,328 plumbers serving Monrovia.
  2. October 2026: 12 duplicate listings merged.

More emergency and plumbing pages