FOSTER CITY (CBS SF/BCN) — Foster City said Wednesday that it has been working with a consulting firm to improve its beaches after three of them ended up on a list of the state’s worst in an annual report released by the non-profit organization Heal the Bay earlier this year.

San Mateo County beaches have consistently made the organization’s “Beach Bummer” list, which ranks the 10 worst beaches graded on water quality events like sewage spills and rainfall, as well as bacteria pollution cultures.

READ MORE: SFPD: Suspects In Violent Smash And Grab Robberies, Car Burglaries Will Be Arrested, Convicted

Foster City’s Erckenbrack Park, Gull Park and Marlin Park all got low health marks because of the urban runoff channels it shares in an enclosed space with little room for circulation, according to the latest report released earlier this week. Heal the Bay said it’s especially concerning that four of the six beaches in San Mateo County that made the “Beach Bummer” list last year were not tracked this year.

According to Heal the Bay’s Beach Report Card, the fourth most polluted beach is Gull Park in Foster City. (Photo courtesy Heal the Bay Communications)

READ MORE: 'Prolific' San Francisco Retail Theft Suspect Back In Jail After New Arrest

“Regrettably, the Foster City area and San Mateo County as a whole have been plagued with poor water quality in recent years,” the report reads. “Last year, six San Mateo County beaches earned spots on the Beach Bummer list. With four of those unmonitored by the county this year, fewer have made the list, but the problem of fecal bacteria pollution remains.”

The city said in a news release Wednesday that it has been working with the firm Environmental and Public Health Engineering Inc. since February to look into the bacteria found in the lagoon. Since March, two out of the six samples had E. coli levels at or above state standards, though no human DNA was found. The city says the bacteria is not likely from sewage, but from seagulls and geese.

Foster City officials say they will continuously collect samples every other week until August in order to assess the need for any water quality measures.

MORE NEWS: California Drought: Big October Storm's Deluge Draining Out Of Lake Sonoma

© Copyright 2021 CBS Broadcasting Inc. and Bay City News Service. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.