5 Single Sample Standard Exceedance Rates for Non-Point Zero Open Coastal Locations

The following table, arranged in geographical order from north to south along the Orange County shoreline, provides the dry weather AB 411 single sample standard exceedance rate at each Orange County open coastal monitoring location from April 1 to October 31 during the 12-year period from 2005 to 2016.

Station

Seal Beach / Surfside / Sunset

Laguna Beach

OSB02 1st Street 9.2% OLB05 Crescent Bay Beach 0.3%

OSB03 8th Street 4.8% S12 Goff Island Beach 0.6%

OSB05 100 Yds South of Pier 2.9% S11 Treasure Island Beach 0.3%

OSB04 14th Street 0.8% S10 Aliso Beach–North 0.6%

OSB01 Sea Way 0.6% S9 Aliso Beach–North 3.2%

OSUB1 Broadway 0.5% S8 Aliso Beach–South 0.8%

Bolsa Chica State Beach S7 Camel Point 0.3%

39N Parking Area #20 0.9% S6 Table Rock 0.2%

33N Parking Area #14 1.6% S5 Laguna Lido 0.0% Huntington City & State Beach S4 9th Street / 1000 Steps 0.3%

27N Bluffs @ Dog Beach 1.8% S3 Three Arch Bay 0.9%

21N 17th Street 0.4% Dana Point

15N Jacks Snack Bar 0.9% S2 Salt Creek Beach 1.2%

12N Beach Blvd. 1.4% S1 Dana Strands 1.1%

9N Newland Street 5.6% S-6 Ocean Institute Beach 0.6%

6N Magnolia Street 8.1% Doheny State Beach

3N Brookhurst Street 9.0% S2 Fence at 1st Campground 14.8%

0 Santa Ana River Mouth 4.6% S-1 Last Campground 9.4% Newport Beach S-3 South Day Use Area 12.4%

3S Orange Street 1.2% S-5 Pedestrian Bridge 9.3%

6S 52nd / 53rd Street 0.4%

Capistrano Beach

9S 38th Street 0.5% S-9 Capistrano County Beach 5.5%

15S 15th / 16th Street 1.1% S-11 Capistrano Bay Dist.–North 5.0%

21S Balboa Pier 0.5% S-13 Capistrano Bay Dist.–South 6.2%

27S The Wedge 0.1% Poche Beach

29S Corona Del Mar Beach 1.1% S-15 Poche Beach 33.6%

ONB3 Little Corona Beach 7.6%

San Clemente City & State Beach

Crystal Cove State Park S-17 North Beach 2.6%

ONB35 Pelican Point 0.6% S-19 450 Feet North of Pier 2.6%

39S Pelican Point Beach 0.4% S-21 Avenida Califia 0.8%

ONB39 Crystal Cove Beach 0.6% S-23 Las Palmeras 0.5%

ONB43 Muddy Creek Beach 0.3%

The following table shows the seasonal single sample standard exceedance rates for Point Zero stations sampled outside of posted Rain Advisory periods. The displayed rates cover both the AB 411 and non AB 411 monitoring periods in 2016.

Point Zero monitoring is a departure from traditional methods of sampling beach areas to determine bacteriological water quality. Instead of monitoring a location within 100 feet of a storm drain, creek, or river to determine health compliance, samples are collected at specific locations where urban runoff physically mixes with the ocean and at points 75 feet upcoast and downcoast. If there is no urban runoff flow to the beach then only one sample is collected where flow would normally occur or what is termed: “virtual point zero.”

Permanent advisory warning signs continue to be posted at all drains, creeks and rivers advising beach goers to avoid urban runoff on the beach and where it enters the water because water quality can change significantly at any time. However, point zero monitoring serves to confirm exceedances of health standards at the receiving water and allows additional public notification which underscores the need to avoid urban runoff.

Point zero monitoring stations are sampled at the surfzone whether or not the associated drain or creek is flowing. Point Zero is identified by the last letter of the Station ID. For example, a station ending with “Z” is point zero, such as POCHEZ. Similarly, the upcoast and downcoast stations that are sampled 75 feet upcoast and downcoast of the associated storm drain, creek or river will have an identifier ending in “U” or “D,” respectively.

NS = No sample. Samples are sometimes not collected for various reasons, such as limited access to a location, safety concerns for our workers due to high surf or hazardous weather conditions, or simply no flow which eliminates the need for collecting the upcoast and downcoast samples.

2016 AB411 Period

Station ID Monitoring Location

South Crystal Cove State Park

2016 Non AB411 Period

APR - OCT JAN - MAR / NOV - DEC

% Exceed # Sanples % Exceed # Sanples

ELMOROU 75 feet upcoast NS 0 NS 0

ELMOROZ El Moro Creek Point Zero 0.0% 27 0.0% 16

ELMOROD 75 feet downcoast NS 0 NS 0

Laguna Beach

APR - OCT JAN - MAR / NOV - DEC

% Exceed # Sanples % Exceed # Sanples

EMRLDU 75 feet upcoast NS 0 0.0% 2

EMRLDZ Emerald Bay Drain Point Zero 0.0% 27 0.0% 16

EMRLDD 75 feet downcoast NS 0 0.0% 2

HEISLRD 75 feet upcoast NS 0 0.0% 1

HEISLRZ Diver’s Cove Drain Point Zero 0.0% 27 3.8% 17

HEISLRD 75 feet downcoast NS 0 0.0% 1

MAINBCU 75 feet upcoast 0.0% 2 12.5% 8

MAINBCZ Broadway Creek at Laguna Main Beach 7.1% 28 20.0% 20

MAINBCD 75 feet downcoast 0.0% 2 12.5% 8

VICTRAU 75 feet upcoast NS 0 0.0% 3

VICTRAZ Hotel Laguna Drain Point Zero 0.0% 27 0.0% 17

VICTRAD 75 feet downcoast NS 0 0.0% 3

CLEOU 75 feet upcoast 0.0% 2 10.0% 10

CLEOZ Cleo Street Drain Point Zero 0.0% 27 11.1% 18

CLEOD 75 feet downcoast 0.0% 2 10.0% 10

BLUBRDU 75 feet upcoast 0.0% 2 0.0% 12

BLUBRDZ Bluebird Canyon Drain Point Zero 0.0% 27 19.0% 21

BLUBRDD 75 feet downcoast 50.0% 2 0.0% 12

PEARLU 75 feet upcoast 0.0% 5 0.0% 3

PEARLZ Pearl Street Drain Point Zero 3.7% 27 9.1% 11

PEARLD 75 feet downcoast 0.0% 5 0.0% 3

DUMONDU 75 feet upcoast 0.0% 2 0.0% 6

DUMONDZ Victoria Beach Drain Point Zero 6.9% 29 0.0% 16

DUMONDD 75 feet downcoast 0.0% 2 0.0% 6

BLULGNU 75 feet upcoast 0.0% 1 0.0% 4

BLULGNZ Blue Lagoon Drain Point Zero 0.0% 8 4.5% 15

BLULGND 75 feet downcoast 0.0% 1 0.0% 4

ACM1U 75 feet upcoast 0.0% 1 25.0% 4

ACM1Z Aliso Creek Point Zero 0.0% 26 11.8% 17

ACM1D 75 feet downcoast 0.0% 1 25.0% 4

WESTU 75 feet upcoast NS 0 NS 0

WESTZ West Street Drain Point Zero 0.0% 26 4.0% 15

WESTD 75 feet downcoast NS 0 NS 0

APR - OCT JAN - MAR / NOV - DEC % Exceed # Sanples % Exceed # Sanples

SCM1U 75 feet upcoast 0.0% 28 5.6% 18

SCM1Z Salt Creek Point Zero 20.6% 34 45.5% 22

SCM1D 75 feet downcoast 0.0% 28 16.7% 18

APR - OCT JAN - MAR / NOV - DEC % Exceed # Sanples % Exceed # Sanples

DSB5U 75 feet upcoast NS 0 0.0% 1

DSB5Z North Beach Creek Point Zero 12.9% 37 22.2% 18

DSB5D 75 feet downcoast NS 0 0.0% 1

SJC1U 75 feet upcoast NS 0 33.3% 9

SJC1Z San Juan Creek Point Zero 6.9% 29 26.3% 19

SJC1D 75 feet downcoast 0.0% 1 30.0% 10

DSB4U 75 feet upcoast NS 0 0.0% 1

DSB4Z South Day Use Area Drain Point Zero 0.0% 27 13.3% 15

DSB4D 75 feet downcoas NS 0 0.0% 1

DSB1U 75 feet upcoast NS 0 NS 0

DSB1Z Drain at End of Park Point Zero 0.0% 27 6.7% 15

DSB1D 75 feet downcoas NS 0 NS 0

APR - OCT JAN - MAR / NOV - DEC % Exceed # Sanples % Exceed # Sanples

CSBMP1U 75 feet upcoast NS 0 NS 0

CSBMP1Z Drain near Point Zero 0.0% 27 0.0% 15

CSBMP1D 75 feet downcoast NS 0 0.0% 0

CSBBR1U 75 feet upcoast NS 0 NS 0

CSBBR1Z Capo Community Beach Drain 0.0% 27 0.0% 15

CSBBR1D 75 feet downcoast NS 0 NS 14

Poche Beach

APR - OCT JAN - MAR / NOV - DEC % Exceed # Sanples % Exceed # Sanples

POCHEU 75 feet upcoast 10.0% 10 0.0% 13

POCHEZ Poche Creek Point Zero 6.9% 29 22.2% 18

POCHED 75 feet downcoast 0.0% 9 7.1% 14

San Clemente City & State Beach

APR - OCT JAN - MAR / NOV - DEC

% Exceed # Sanples % Exceed # Sanples

SCCS52U 75 feet upcoast NS 0 0.0% 2

SCCS52Z Capistrano Shores North Drain 0.0% 27 0.0% 16

SCCS52D 75 feet downcoast NS 0 0.0% 2

SCCS17U 75 feet upcoast NS 0 NS 0

SCCS17Z Capistrano Shores South Drain NS 0 NS 0

SCCS17 75 feet downcoast NS 0 NS 0

PICOU 75 feet upcoast 0.0% 1 0.0% 0

PICOZ Pico Drain at North Beach Point Zero 3.5% 29 0.0% 13

PICOD 75 feet downcoast 0.0% 1 0.0% 8

MARIPOU 75 feet upcoast NS 0 NS 0

MARIPOz Mariposa Lane Drain Point Zero 0.0% 26 0.0% 12

MARIPOD 75 feet downcoast NS 0 NS 0

LINDALU 75 feet upcoast NS 0 0.0% 2

LINDALZ San Clemente Pier Drain Point Zero 0.0% 26 0.0% 14

LINDALD 75 feet downcoast NS 0 0.0% 3

PIERU 75 feet upcoast 0.0% 19 0.0% 5

PIERZ

PIERD

TRFCYNU

TRFCYNZ

TRFCYND

RIVERAU

RIVERAZ

RIVERAD

LADERAU

LADERAZ

LADERAD