🏊 Official Rankings
10 Best Pool Service in O'Fallon, MO (September 2026)
We compared 10 pool service serving O'Fallon and Saint Charles County, Missouri, and ranked the top providers by verified reviews, ratings, and local reputation — 794 customer reviews in all.
The 10 listed below hold an average rating of 4.8 out of 5, led by Show Me State Pressure & Softwashing. Updated for September 2026.
- Pool Service ranked
- 10
- Average rating
- 4.8★
- Reviews analyzed
- 794
- Area codes
- 636, 314
⭐ 5.0 · 170 reviews
1175 Pinewood Pl Dr, O'Fallon, MO 63366
⭐ 4.9 · 110 reviews
506 S Cool Springs Rd, O'Fallon, MO 63366
⭐ 4.8 · 41 reviews
17 Porta Dr, O'Fallon, MO 63366
⭐ 5.0 · 17 reviews
1004 Brook Mont Dr, O'Fallon, MO 63366
⭐ 4.7 · 37 reviews
2905 N St Peters Pkwy, St Peters, MO 63376
⭐ 4.6 · 122 reviews
1680 Highway K, Megan Crossing, O'Fallon, MO 63366
⭐ 4.5 · 121 reviews
151 N Service Rd, St Peters, MO 63376