In the State of Massachusetts, it is required to have a certified pool operator for all public and semi-public swimming pools.

Section 435.17: Pool Supervision states
(1) All public and semi-public swimming pools when open for use shall be under the management of a supervisor, who shall be responsible for all phases of the pool operation. The pool supervisor may be the property owner, a facility employee or an employee of a contracted pool service. The pool supervisor shall be available to respond to mechanical and maintenance problems, and to detect the potential of such problems before they occur. It is not required that the pool supervisor be on the premises at all times. The pool supervisor shall be:
(a) at least 21 years of age,
(b) knowledgeable of 105 CMR 435.00, and
(c) responsible for all phases of the operation.

(2) Effective January 1, 1999 the pool supervisor of all public and semi-public swimming pools shall have successfully completed a course in the safe and effective operation and maintenance of swimming pools as evidenced by certification as a Pool Operator from the YMCA, the
National Swimming Pool Foundation, or from any other organization providing equivalent training, subject to the approval of the Department.”

Operators must follow state, county, city and local laws as well as federal laws pertaining to the operation and maintenance of pools and spas.

CPO Certification Massachusetts State Pool Forms

Code Excerpts

Criteria CPO Certification Massachusetts
What is to be recorded TAC, FAC, CAC, pH, Alkalinity, Calcium, Cyanuric Acid, Water Temperature
Water Testing Frequency 4x’s per day, at least 1time during peak use (alkalinity & calcium hardness weekly)
Chlorine Levels (Min-Max) POOL:  1.0-3.0 CH, 2.0-6.0 BR (gas prohibited)
SPA: 1.0-3.0 CH, 2.0-6.0 BR (gas prohibited)
WADING: 1.0-3.0 CH, 2.0-6.0 BR (gas prohibited)
pH Levels (Min-Max) 7.2-7.8 CH (50-150 ppm alkalinity)
Chlorine Test Kit Requirements DPD replace annually
pH Test Kit Requirements phenol red
Cyanuric Acid Levels (Min-Max) 30-100 ppm
Water Clarity 6″ black disk on white field, visible at deepest point from sidewalks up to 10 yds
Turnover Rate POOL: 8 hrs
SPA: 30 minutes
WADING: 4  hrs
Bather Load (per bather) POOL: <5ft 15 sq ft, >5ft  20 sq ft, Diving 300 sq ft
SPA: 10 sq ft drain, clean once/14 days
WADING: 15 sq ft
Depth Markings POOL: Deck & Pool black line in pool & on steps
SPA: Deck & Pool black line in pool & on steps
WADING: Deck & Pool black line in pool & on steps
CPO® Required All Pools

Class Schedule

Date Location
2024 2024
February 20-21, 2024 Plymouth, MA
February 22-23, 2024 Worcester, MA
March 12-13, 2024 Norwood, MA
March 14-15, 2024 Lowell, MA
March 19-20, 2024 Pittsfield, MA
March 21-22, 2024 Worcester, MA
March 23-24, 2024 Cape Cod, MA
April 13-14, 2024 Norwood, MA
April 27-28, 2024 Peabody, MA
May 14-15, 2024 Taunton, MA
May 16-17 2024 Springfield, MA
May 18-19, 2024 Lowell, MA
June 12-13, 2024 Norwood, MA
July 20-21, 2024 Peabody, MA
September 28-29, 2024 Norwood, MA
October 12-13, 2024 Taunton, MA
November 2-3, 2024 Plymouth, MA

To register by check, print and complete registration form and mail with check to Pool Operation Management, 68 Edwards Road, Brick, NJ 08723. Please make checks payable to Pool Operation Management.

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