TODAY

WATER QUALITY CONFERENCE, how clean or polluted are Hawai'i's drinking and recreational waters, Oct. 30-31, Pagoda Hotel, International Room; sponsored by University of Hawai'i Water Resources Research Center. www.wrrc.hawaii.edu/october08conference.htm.

HAWAIIAN HISTORICAL SOCIETY membership meeting, lecture on Kalaupapa, Drs. Kekuni Blaisdell and Benjamin Young to be honored, 6:30 p.m., Kamakakuokalani Center for Hawaiian Studies, University of Hawai'i-Manoa; free. 537-6271.

HAWAI'I KAI FARMERS' FORUM, on the future of farming in Kamilonui Valley, 7 p.m., Koko Head Elementary School. 586-6420.

WAHIAWa neighborhood security meeting, focusing on con artists, identity theft and home burglaries, 7 p.m., Wahiawa District Park. 621-5109, ext. 226.

TOMORROW

45TH ANNUAL COIN SHOW by the Hawaii State Numismatic Association, featuring coins, stamps, postcards, watches, jewelry and other collectibles, noon-6 p.m., Hawai'i Convention Center, Room 316; repeats 10 a.m.-6 p.m. Nov. 1 and 10 a.m.-5 p.m. Nov. 2; free.

REGISTRATION DEADLINE for the "Tools for Suicide Prevention and Intervention" conference, Nov. 21, Pacific Beach Hotel; professionals and the public urged to attend; sponsored by the state Department of Health. www.hawaii.gov/health, 733-9238.

SATURDAY

FIRST SATURDAY collection drive, bring new or gently used Halloween costumes and accessories to American Savings Bank branches; benefit for Big Brothers Big Sisters. www.asbhawaii.com.

BLOOD DRIVE, 6:30 a.m.-1:30 p.m., Town Center of Mililani; 7:30 a.m.-1 p.m., Pearlridge Center; must be 18 or older, in good health, weigh at least 110 pounds and present photo ID. 845-9966.

ARBOR DAY PLANT GIVEAWAY, 500 native plants, 8:30 a.m.-12 p.m., Amy Greenwell Garden; donation $4; also, celebration of medicinal and nutritional Hawaiian plants, 9 a.m.-3 p.m. Nov. 1, Hawaii Healing Garden; free. 808-323-3318, agg@bishopmuseum.org.

HAWAII CAREGIVER'S CONFERENCE: "Caring for Family, Caring for Yourself," to inform family and professional caregivers about elder care issues and help navigate the long-term care system, 8 a.m.-3:30 p.m., Sheraton Waikiki; family caregivers $45, professional caregivers $60. Register: www.elderlyaffairs.com, 768-7700.

Diabetes risk tests and blood pressure screening, 9 a.m.-3 p.m., Saturdays in November, Blaisdell Park, 'Aiea. 852-1816.

FREE FLU SHOTS for HMSA, HMSA 65C Plus and HMSA QUEST members, ages 18 and older, 9 a.m.-3 p.m., Wal-Mart Kunia; nonmembers $40; Medicare Part B beneficiaries with Medicare card and photo ID free.

SCHOOL RECYCLING DRIVE, 9 a.m.-3 p.m., Kailua High School parking lot. Donations of HI-5¢ redeemable cans, plastic bottles and glass bottles welcome to help fund KHS Project Graduation 2009.

KAIMUKI KANIKAPILA, craft, artist, merchant and food booths and two entertainment stages, 9 a.m.-4 p.m., Kaimuki Community Park.

BILL'S BOOKMOBILE, 10 a.m.-2 p.m., 690 Pohukaina St., Kaka'ako; sponsored by Friends of the Library of Hawai'i.

PAU A'READY BLOCK PARTY, food and entertainment for teens, 12-3 p.m., Pupuole Park, Waipahu; hosted by Salvation Army and the Department of Justice teen outreach program; free.