Water Services


Lawn Watering



Locating Underground Utilities

If you are planning to do any digging in excess of 12 inches on your property, please call 811 for a locate request. Brookings Municipal Utilities will locate electric, water and sewer lines at no charge. The procedure will take between ten to thirty minutes. Contact the Service Department at (605) 697-8418 to set up an appointment.

Sump Pump Usage

Brookings Municipal Utilities rules and city ordinance 16-93 require Brookings wastewater customers to route their sump pumps out of the sanitary sewer system between March 15th and October 15th each year. Utility personnel begin inspections for compliance on March 20th. The fine for users found to be in non-compliance is up to $200.00 per day.

Water Treatment Plants

The city of Brookings receives its water supply from underground aquifers. An aquifer located two miles east of Brookings supplies water to our East Plant. The aquifer covers an area of approximately 20 square miles and has a drainage area of approximately one hundred square miles. The drainage area provides an average recharge of water into the aquifer of nine billion gallons annually.

The East treatment Plant, which has four wells, can provide up to four million gallons of treated water to Brookings each day. More wells can be added, if needed.

Brookings Municipal Utilities maintains a second water treatment plant one mile north of the City. Its water source is also from an underground aquifer.

Five wells operate at the North Plant and can provide up to 2.5 million gallons of treated water to Brookings each day. The East and North Plant have a combined daily capacity of 6.5 million gallons of treated water.

A 3 million gallon above ground storage tank is located adjacent to the East Water Plant and an underground 1.5 million gallon tank is adjacent to the North Plant. This makes for a total storage at the plants of 4.5 million gallons. Three water towers are located in the city with a combined storage of 1.75 million gallons.

Water Treatment Process

The process of treating water is similar at both plants. The first step is aeration to remove hydrogen sulfide and to aid in the removal of iron and manganese.

Following aeration, the water enters a “solid contact basin”. Lime is added to the water to form “floc particles”. These particles settle to the bottom of the basin carrying the minerals to be removed. A “lime sludge” forms at the bottom of the basin and is automatically pumped to drying beds.

The clarified water is removed from the surface of the basin through launder troughs and flows to gravity filters. The gravity filters remove any remaining particles to provide final clarification for the water before delivery to the distribution system. After the water passes through the filters it drops into a clearwell where chlorine is applied for disinfecting and fluoride is added for tooth decay prevention.

The water is then stored in reservoirs to be used as needed. Brookings Municipal Utilities is proud to say that our water meets and exceeds all state and federal regulations for drinking water.

Water Quality Report