1. Public Water Supply District 3
1469 Old State Route 21, Arnold, MO 63010
Coordinate: 38.45253,-90.44635
Phone: (636) 296-7053
2. N E Public Sewer District
407 Persimmon Rdg, Arnold, MO 63010
Coordinate: 38.44491,-90.41397
Phone: (636) 287-9251
3. Rock Creek Public Sewer District
4133 W Outer Rd, Arnold, MO 63010
Coordinate: 38.39644,-90.38266
Phone: (636) 464-3305