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Rules and Policies 

Pool users are responsible for knowing the rules and policies of this facility and acting accordingly.

The Trefethen Aquatic Center staff has complete authority to enforce the rules at their discretion to ensure the safety of all pool users. Mills reserves the right to change hours and/or facility availability to meet programming or staffing needs. Every effort will be made to give advance notice of changes.

No one is allowed to use the Aquatic Center without lifeguard supervision.

Everyone must have a picture ID to use the pool.
Exception: children accompanied by an adult or program supervisor.


  • Mills students may have immediate family or one individual as guests. Guests must be accompanied by the student, and the host must remain in the pool area as long as the guests are present.
  • Mills faculty and staff must accompany their children under 14 years of age.
  • Children of alumnae must be accompanied and supervised by their alumna parent at all times.
  • Children under three are not charged a fee to swim and children under six must be accompanied by an adult in the water at all times.
  • All children 12 and under must be directly supervised by an adult guardian 18 years of age or over.
  • A Friend of the College must be 18 years of age or older or accompanied by an adult guardian 18 years of age or over.
  • Unless they are children of faculty or staff with a Fac/Staff Family Pass, children under 18 years of age may not be in the pool facility without an adult guardian present.

Due to the potential for injury, diving is allowed only in the deep end and only under the strict supervision of a lifeguard or instructor during classes and swim meets. Jumping in the shallow water or playing on the steps in a manner which creates a hazard for the swimmer or others will not be allowed.

Infants and toddlers who are still in diapers must wear a “swim diaper."

Everyone, including infants and toddlers, must wear appropriate attire in the pool and on the deck.

All flotation devices worn by children must be of solid material, not inflated, and shall be Coast Guard approved, and must fit properly and be properly worn. Children wearing flotation devices must be accompanied at all times by an adult who is in the water.

Fins, kickboards, buoys, and jogging belts can be checked out and may be used by lap swimmers in lap lanes only. Children under 14 are not allowed to use this equipment unless in a supervised program.

With the exception of water in clear plastic bottles all food or beverages whether brought in or purchased here must be consumed in the designated Eating Area or outside of the enclosed pool area. No glass containers.

Individuals entering the pool area during Recreational Swim times for the sole purpose of watching or waiting will be charged the regular entry fee.

The therapy spa is for adults (18 years of age or older) and Mills students only. Children are not allowed within the designated spa area.

Mills College is not responsible for personal items brought to the pool including items stored in lockers. Lockers in the locker rooms may be rented for $25 per semester (free for Mills students). Personal locks left on lockers will be removed.

NO SMOKING anywhere in or near the aquatic facility.

RADIOS, TAPE/CD PLAYERS, OTHER AUDIO DEVICES may be used only with headsets.

CAMERA-CAPABLE DEVICES are not to be used in the locker rooms.

NO HYPERVENTILATION followed by prolonged underwater breath-holding or swimming.


Our toy and play policy is based on a safety first philosophy.

These rules need to apply whether there are 2 or 200 people in the pool.

We encourage toys that assist children to learn while they play: toys that can be dropped and retrieved, that help children submerge and open their eyes.

We say YES to:
• Small toys that float
• Retrievable toys that sink (like rings that are dropped not thrown)

We do not allow toys that give a false sense of safety, that can intrude on other people’s enjoyment or safety, or require training for proper, safe use.

We say NO to:
• Inflatable toys that are ridden on or in or worn
• Toys that are thrown, squirted, or launched in any manner
• Masks, fins, and snorkels for other than lap swimming
• “Noodles”
• Any toys that are used in a manner that is hazardous to the user or to other swimmers


When playing in the water the following rules are enforced:

  • No riding on shoulders
  • No throwing toys or people
  • No grabbing around the neck
  • No dunking, spashing, tag or other play that intereferes with other people's safety or enjoyment
  • No hyperventilation followed by prolonged underwater swimming


Aquatics Center

Pool Schedule/Fees

Pool Programs

Rules & Policies

Swim Lessons


Junior Lifeguarding

Basic Water Rescue

Water Safety Instructor & Lifeguarding
Instructor Classes

Mills College Master's Swimmers

Contact Information

Trefethen Aquatic Center

P: 510.430.2170
E: pool@mills.edu 

Last Updated: 6/17/14