Update from Central Coast Water Quality Control Board

May 11 , 2011
Strawberry Workshop
Corinne Huckaby
Irrigated Agriculture Program
Lead, Santa Maria River Watershed
Central Coast Regional Water Quality
Control Board
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Water Board’s Mission
“…to preserve, enhance and restore the quality of California’s
water resources, and ensure their proper allocation and efficient
use for the benefit of present and future generations.”
2
SANTA MARIA
WATERSHED
Beneficial Uses Impacts
Not safe to drink
Not safe to swim
Not safe to fish
Not healthy for fish
Not healthy for wildlife
Lower Santa Maria Watershed
15 Waterbodies
All Polluted
Orcutt Creek (15)
Oso Flaco Lake/Creeks(14)
Santa Maria River (13)
Main Street Canal (8)
Pollutants
Nitrate
Water Toxicity
Unionized ammonia
Sediment Toxicity
Chlorpyrifos
Dieldrin
Diazinon
DDT
Fecal Coliform
Boron
Chloride
Dissolved Oxygen
Temperature
Turbidity
pH
3
Nitrates ~
~ Surface
Surface Water
water
Nitrates
Santa Maria River Estuary
Orcutt Creek u/s SM River
4
Nitrates ~ Groundwater
Santa Maria Groundwater Basin
Maximum Nitrate Concentrations
in Public Water Supply Wells
(≥ 15 connections)
1984 to 2009
NO3 Concentrations in milligrams
per Liter (mg/L)
<14 mg/L as NO3
14 mg/L to 44 mg/L as NO3
>= 45 mg/L as NO3
42
27%
51
33%
62
40%
5
5
TOXICITY ~ SURFACE WATER
Water & Sediment
Toxicity ~ 303d list
caused by
legacy (dieldrin, endrin,
toxaphene, DDT) and
current use pesticides:
chlorphyrifos, diazinon,
malathion, pyrethroids
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Waterbody
303(d) Listing
Additional Impairments
Blosser Channel
None Identified
Chlorpyrifos,
Chlorpyrifos, Diazinon
Pyrethroids, DDT
Bradley Channel
Chlorpyrifos
Pyrethroids
Diazinon, DDT
Green Valley Creek
Chlorpyrifos
Oso Flaco Creek
None Identified
DDT
Malathion
Oso Flaco Lake
Dieldrin
DDT
Chlorpyrifos
Diazinon
DDT
Pyrethroids
Chlorpyrifos,
Chlorpyrifos, Diazinon
Dieldrin,
Dieldrin, DDT
Pyrethroids
Chlorpyrifos,
DDT,
DDT, Dieldrin,
Dieldrin, Endrin, Toxaphene
Diazinon
Pyrethroids
Main Street Canal
Orcutt Creek
Santa Maria River
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Pyrethroid Pesticides
(A.I. and Ag. Trade Name)
Bifenthrin
Capture
Brigade
Cyfluthrin
Baythroid
Cypermethrin
Ammo
Esfenvalerate
Asana XL
Lambda-Cyhalothrin
Karate
Warrior
Permethrin
Pounce
Ambush
8
Pyrethroid Use
Agricultural Applications
Structural Non-Ag. Applications
Unreported Home and Garden Use
9
Bifenthrin Use
Crop
Artichoke, globe
Pounds
Percent
38
2%
350
300
Landscape
Maintenance
Strawberry
21
958
1%
47%
Pounds
250
200
150
100
50
48%
Other Crops
42
2%
0
nu
F e a ry
br 20
ua 08
M a ry 2 0
r c 08
h
A p 20 0
ril 8
2
Ma 0 08
y
J u 2 00
ne 8
2
Ju 0 08
l
y
A
2
S e u gu 0 0 8
pt e s t 2
mb 00
8
Oc er
t o 20 0
N o be 8
ve r 2
D e m be 00 8
ce r 2
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be 0 08
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00
8
960
Ja
Structural pest
control
Month
Total
2019
100 %
STRAWBERRY
2008 PUR data
3 Year Average (06-08)
10
Malathion Applications
Oso Flaco sub-watershed from 2005 to 2008.
Commodity
BROCCOLI
CELERY
LETTUCE
STRAWBERRY
All Other
Commodities
Total
2005
787
1219
9577
2006
503
2311
12081
268
2007
2212
3263
9687
1135
2008
1844
1394
9129
6322
187
163
455
444
11771
15328
16755
19134
14000
Lbs. of Malathion Applied
12000
10000
BROCCOLI
8000
CELERY
LETTUCE
6000
STRAWBERRY
All Other Commodities
4000
2000
0
2005
2006
2007
2008
Yearly Total
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2009 Oso Flaco Study:
Study
Highest fish tissue concentration of legacy pesticides (i.e.,
dieldrin and DDT) in the United States.
Posted for health warning.
Ongoing sedimentation and fish tissue contamination due to
current pesticides in Oso Flaco
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Item No. 22 May 4-5, 2011
Executive Officer’s Report
U.C. Davis Marine Pollution Studies Laboratory and the U.S. Geological Survey recently completed a grant funded
project on the status of three of our central coast lagoons.
Santa Maria Estuary. The Santa Maria estuary was the most severely
impacted estuary in this study. The majority of water and sediment samples
were toxic, with chlorpyrifos and pyrethroid pesticides associated with toxicity.
Benthic invertebrates at all stations were highly impacted. This study attributes
impacts primarily to flows from Orcutt Creek, which was also highly toxic to
both sediment and water from the same pesticides that were measured in the
estuary. Sand crabs and fish tissue had detections of a number of different
fungicides, herbicides, and pesticides, at higher levels than in the other two
estuaries. Sand crabs had elevated levels of DDT, as well as bifenthrin,
cyfluthrin, diazinon, chlorpyrifos, azoxystrobin, pyraclostrobin, and boscalid.
Thirteen currently applied chemicals, as well as DDT and its breakdown
products, were detected in fish. Chlorpyrifos, diazinon, and bifenthrin were
detected in all fish collected, as were the fungicides azoxystrobin and
pyraclostrobin.
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Drift and Volatilization
Runoff
Stream
Groundwater
River
14
Basic Pesticide Properties and Risks
Properties (Solubility, Adsorption, Half-life )
Risks (Leaching, Runoff, Drift)
Types of chemicals and toxicity inform BMP
selection
More soluble pesticides can be addressed
through irrigation and runoff management
Less soluble, more persistent pesticides
can be addressed through filtration and
sediment control
http://www.curesworks.org/publications/pyRowCrop.pdf
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Basic Site Characteristics
Site Drainage Patterns
Irrigation and storm water runoff
Proximity to storm drain, ag. ditch or receiving
water
Cover (vegetation, impervious surface, or
vegetation)
Site BMPs
Buffers
16
Irrigated Agriculture Order Renewal
March 17, 2011 Board Meeting
May 4, 2011 Board Meeting
Additional public testimony
Farm Bureau’s amendments
Staff’s recommendation
Board Direction to Staff
Future 2011 Board Meeting
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Agricultural Order
Objectives
Eliminate or reduce discharges
that load pollutants to surface
water and groundwater
Do not cause or contribute to
exeedances of water quality
standards
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3 Tiers - Criteria
Crops known to have higher nitrate loading impacts
Chemicals known to cause pollution
Proximity to an impaired waterbody or public
water system well
Discharge to toxic or pesticide impaired waterbody
Size of farm operation
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2011 Order Tier 1
Tier 2 Minus:
Annual compliance info
- Online entry form
2011 Order Tier 2
Meet Water Quality Standards
File Notice of Intent
2011 Order Tier 3
Tier 2 Plus:
Individual Monitoring
Farm Plan
-- irrigation management
-- pesticide management
-- nutrient management
-- erosion management
Water Quality Buffer Plan
Irrigation and Nutrient
Mgmt Plan
Time Schedules
-- schedules to implement
Surface Water Monitoring
Education
Groundwater sampling and reporting
Backflow prevention
Annual compliance info – Online entry form
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Agriculture Electronic Notice of
Intent (e-NOI)
Contact our office immediately for assistance
with enrollment if you have not yet enrolled
Required Information
AW# (Ag Waiver Identification #)
Ranch contact information
Operation contact information
Monitoring Selection
Date of last Farm Plan update
Farm water quality education completion
Ranch map(s) and location(s)
Landowner(s) contact information and associated APN’
APN’s
Irrigated acreage
Total tailwater acres
Irrigation type(s)
Crop type(s)
Name of any waterbody(s) adjacent to farm/ranch
Pesticide permit information
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Technical Assistance
Cachuma Resource Conservation District
Central Coast Water Quality Preservation
(Cooperative Monitoring Program)
Sarah Greene Lopez, (831) 331-9051
Strawberry Commission
Kevin Peterson, (805) 928-9269
Laura Gregory, (805) 268-6628 (cell)
UC Davis Farm Advisors
Surendra Dara, (805) 934-6240
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Thank you for your time
Office:
895
San
Aerovista Place,
Luis Obispo, CA
Ste 101
93401
Contact:
Corinne Huckaby
Irrigated Agriculture Program
Lead, Santa Maria Watershed
(805) 549-3504
Monica Barricarte, Espanol
(805) 549-3881
websites:
http://www.waterboards.ca.gov/central coast
http://www.ccamp.org
http://www.waterboards.ca.gov/resources/email_subscriptions/reg3_subscribe.shtml
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