🏊 Official Rankings
10 Best Pool Service in Ontario, CA (September 2026)
We compared 10 pool service serving Ontario and San Bernardino County, California, and ranked the top providers by verified reviews, ratings, and local reputation — 404 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by WestCoast Pool Service and Repair. Updated for September 2026.
- Pool Service ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 404
- Area code
- 909
⭐ 4.7 · 74 reviews
13545 Euclid Ave, Ontario, CA 91762
⭐ 4.6 · 22 reviews
8202 Montara Ave, Rancho Cucamonga, CA 91730
⭐ 4.5 · 42 reviews
1250 E Francis St, Ontario, CA 91761
⭐ 5.0 · 4 reviews
305 N 2nd Ave #157, Upland, CA 91786
⭐ 5.0 · 3 reviews
1042 N Mountain Ave #238, Upland, CA 91786
Pool Service listed here serve Ontario, San Bernardino County, and nearby ZIP codes including 91758, 91761, 91762, 91764, 91798.