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Emergency Plumbers in Longmont, CO (2026)

Top 50 of 401 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 Longmont: Longmont Water Heaters, 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 Longmont at a glance

Top emergency plumbers in Longmont at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Longmont Water Heaters645.0★ (191)Longmont24/7
2M and M Heating, Cooling, Plumbing and Electrical644.9★ (3,075)Longmont24/7
3Kodiak Plumbing Solutions, LLC635.0★ (122)Longmont24/7
4Benjamin Franklin Plumbing of Denver634.8★ (2,904)Westminster, 18 mi away24/7
5Welzig Heating, Air, Plumbing & Electric624.9★ (1,269)Longmont24/7
6Roto-Rooter Plumbing & Water Cleanup614.8★ (572)Boulder, 13 mi away24/7
7Big Apple Plumbing LLC - Broomfield, CO615.0★ (496)Broomfield, 16 mi away24/7
8Reliable Longmont Plumbing615.0★ (32)Longmont24/7
9MESA Plumbing, Heating and Cooling614.8★ (233)Erie, 11 mi away24/7
10Safe Plumbing Longmont Services615.0★ (26)Longmont24/7

Call an emergency plumber in Longmont 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 Longmont, 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 401 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.

  16. #16 King Rooter & Plumbing | Plumber Boulder, CO | Drain Cleaning | Sewer & Water Line | Tankless Water Heater Repair

    Based in Boulder, 14 mi away

    60/100CR Score

    Ranked #16 because of its Google rating and trade focus: 4.9★ from 190 Google reviews, listed on Google as “Plumber”.

    • 4.9★ from 190 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1434 Spruce St Suite 100, Boulder, CO 80302
    View profile for King Rooter & Plumbing | Plumber Boulder, CO | Drain Cleaning | Sewer & Water Line | Tankless Water Heater Repair(720) 776-9570

Top 50 of 401 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 Longmont, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26TNT Home Services - Longmont594.8★ (865)In Longmont
27Boss Rooter & Restoration595.0★ (105)15 mi
28Boulder Water Heaters595.0★ (64)12 mi
29Jim Needham Heating Cooling Plumbing and Drain594.9★ (5,597)23 mi
30SUPERIOR MILE HIGH PLUMBING595.0★ (122)17 mi
31Colorado Best Plumbing594.9★ (137)18 mi
32Core Comfort Plumbing584.7★ (28)7 mi
33Swan Plumbing Heating & Air Of Loveland584.8★ (2,466)18 mi
34Affordable Erie Plumbing Experts585.0★ (27)9 mi
35Superior Boulder Plumbing Experts585.0★ (27)9 mi
36Jenny's Plumbing & Heating584.7★ (58)12 mi
37Hot Water Now!584.7★ (288)21 mi
38Affordable Plumbing and Heat584.6★ (333)21 mi
39Jim Needham Heating Cooling Plumbing and Drain584.9★ (61)In Longmont
40All Sewer and Plumbing Services LLC584.9★ (172)21 mi
41Big Apple Plumbing LLC - Thornton, CO585.0★ (88)18 mi
42Miller Brothers Plumbing & HVAC584.8★ (73)16 mi
43Berthoud Plumbing & Drains585.0★ (21)10 mi
44B-Line Plumbing & Drains585.0★ (100)19 mi
45KP Plumbing584.8★ (112)19 mi
46Legacy Excavation LLC585.0★ (15)8 mi
47Mesa Plumbing, Heating and Cooling584.7★ (731)13 mi
48Loveland Plumbing & Drain Pros585.0★ (35)13 mi
49Premier Plumbing & Drain Lafayette585.0★ (29)12 mi
50Quester Plumbers Firestone585.0★ (18)9 mi

How we ranked emergency plumbers in Longmont

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 Longmont: questions

Which plumbers in Longmont are open 24/7?

25 on this list post 24/7 hours, including Longmont Water Heaters, M and M Heating, Cooling, Plumbing and Electrical, Kodiak Plumbing Solutions, LLC, Benjamin Franklin Plumbing of Denver and Welzig Heating, Air, Plumbing & Electric.

Who is ranked #1 for emergency plumbing in Longmont, CO?

Longmont Water Heaters is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency plumbers in Longmont 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 Longmont

  1. October 2026: CR Scores recalculated for 401 plumbers serving Longmont.
  2. October 2026: 4 duplicate listings merged.

More emergency and plumbing pages