San Luis Rey Monitoring Station

Regional Urban Runoff Monitoring Program Update MEC

Order Program Components Stream Bioassessment Monitoring Stream Bioassessment Monitoring Long-term Mass Loading Station Monitoring Long-term Mass Loading Station Monitoring Ambient Bay, Lagoon and Coastal Receiving Waters Monitoring Ambient Bay, Lagoon and Coastal Receiving Waters Monitoring Dry weather monitoring (ICID Program) Dry weather monitoring (ICID Program) Coastal Storm Drain Outfall Monitoring Coastal Storm Drain Outfall Monitoring Toxic Hot Spots Monitoring Toxic Hot Spots Monitoring

Santa Margarita

Santa Margarita Watershed Fecal coliform Total suspended solids (3/5) turbidity (3/5)

Bioassessment Index of Biotic Integrity ratings mostly Fair or Good. Index of Biotic Integrity ratings mostly Fair or Good. Highest taxa richness - IBI scores were close to some of the reference site scores. Highest taxa richness - IBI scores were close to some of the reference site scores.

ABLM Low chemistry (metals) concentrations Low chemistry (metals) concentrations No sediment toxicity No sediment toxicity Benthic community similar to other embayments Benthic community similar to other embayments

San Luis Rey

San Luis Rey Watershed Total dissolved solids Total dissolved solids

Bioassessment – San Luis Rey Index of Biotic Ratings of Very Poor for both sites and both surveys. Index of Biotic Ratings of Very Poor for both sites and both surveys. The in-stream physical habitat of these sites was marginal, which could be limiting, but the sites are quite similar to the Santa Margarita site on Camp Pendleton (which had a substantially higher IBI score), indicating water quality may also have been a factor..

ABLM – San Luis Rey 6 metals and 10 PAHs - all at very low concentrations. 6 metals and 10 PAHs - all at very low concentrations. Very low mean ERM-Q. Very low mean ERM-Q. Sediment toxicity Sediment toxicity Benthic community indices suggested that the biotic community in the Estuary sediments was poor compared to other embayments in San Diego County. Benthic community indices suggested that the biotic community in the Estuary sediments was poor compared to other embayments in San Diego County. Based on these results, San Luis Rey River Estuary ranked third best for sediment quality among the coastal embayments in San Diego County.

ABLM – Oceanside Harbor Metals detected – copper and zinc above ERL Metals detected – copper and zinc above ERL Sediment toxicity Sediment toxicity Good benthic community Good benthic community

Carlsbad

Carlsbad

Carlsbad

Carlsbad – Agua Hedionda Fecal Coliform, TSS, TDS, Turbidity Toxicity only one storm event – Hyalella (last year cerio in all three and hyalella in two events) Trends increasing COD, TKN, total phosphorus, TSS, and turbidity

Carlsbad – Escondido Creek Fecal coliform, TDS, Turbidity Diazinon – last four storm events below 0.08 limit. Concentrations 0.06 to 0.03 ug/l No toxicity last two seasons

Bioassessment- Carlsbad WMA Two sites each Agua Hedionda and Escondido Creek Two sites each Agua Hedionda and Escondido Creek Index of Biotic Integrity Very Poor at all four sites. Index of Biotic Integrity Very Poor at all four sites.

ABLM – Carlsbad WMA Buena Vista Lagoon 6 metals - low compared to ERL and ERM values. Concentrations of all the metals were below their respective ERLs except copper. 6 metals - low compared to ERL and ERM values. Concentrations of all the metals were below their respective ERLs except copper. Sediment Toxicity Sediment Toxicity Only three taxa were found in Buena Vista Lagoon, all of which were freshwater animals. Only three taxa were found in Buena Vista Lagoon, all of which were freshwater animals. Based on these results, Buena Vista Lagoon ranked last overall among the coastal embayments in San Diego County. This poor ranking is likely due to the influence of fresh water and lack of tidal flushing in the Lagoon.

ABLM – Carlsbad WMA Agua Hedionda Lagoon six metals detected only copper, exceeded ERL. six metals detected only copper, exceeded ERL. Sediment toxicity Sediment toxicity Benthic community indices suggested that the biotic community in the Lagoon sediments was fair compared to other embayments in San Diego County. Benthic community indices suggested that the biotic community in the Lagoon sediments was fair compared to other embayments in San Diego County.

ABLM – Carlsbad WMA Batiquitos Lagoon 6 metals detected - arsenic and copper exceeded ERLs. 6 metals detected - arsenic and copper exceeded ERLs. Sediment toxicity Sediment toxicity Benthic community indices was good compared to the other embayments. Benthic community indices was good compared to the other embayments. Based on these results, Batiquitos Lagoon ranked seventh overall (tied with Agua Hedionda Lagoon) for sediment quality among the coastal embayments assessed.

ABLM – Carlsbad WMA San Elijo Lagoon 9 metals detected none exceeded ERL value. 9 metals detected none exceeded ERL value. Sediment toxicity Sediment toxicity Benthic community indices suggested that the biotic community in the Lagoon sediments was poor compared to other embayments in San Diego County. Benthic community indices suggested that the biotic community in the Lagoon sediments was poor compared to other embayments in San Diego County. Based on these results, San Elijo Lagoon ranked second to last for sediment quality among the coastal embayments in San Diego County.

San Dieguito

Total Dissolved Solids

Bioassessment – San Dieguito Green Valley Creek at West Bernardo Drive - Very Poor Spring 03 and Fall 04 Green Valley Creek at West Bernardo Drive - Very Poor Spring 03 and Fall 04 San Dieguito River below Lake Hodges - Poor in October and Very Poor in May. San Dieguito River below Lake Hodges - Poor in October and Very Poor in May.

ABLM – San Dieguito 6 metals detected non above ERL 6 metals detected non above ERL No sediment toxicity No sediment toxicity Poor benthic community Poor benthic community

Penasquitos

Penasquitos

Penasquitos

Penasquitos Total Dissolved Coliform Fecal Coliform (5/9)

Bioassessment - Penasquitos Los Peñasquitos Creek in Poway - IBI ranking very poor Los Peñasquitos Creek in Poway - IBI ranking very poor Carroll Canyon Creek in Sorrento Valley – IBI ranking poor Carroll Canyon Creek in Sorrento Valley – IBI ranking poor The Carroll Canyon Creek site was rated slightly higher than the upstream site on Los Peñasquitos Creek, possibly due to different watershed areas contributing to the different streams.

ABLM - Penasquitos 6 metals detected, none above ERL 6 metals detected, none above ERL Sediment toxicity Sediment toxicity Benthic community indices suggested that the biotic community in the Lagoon sediments was fair. Benthic community indices suggested that the biotic community in the Lagoon sediments was fair. Based on these results, Los Peñasquitos Lagoon ranked near the middle for sediment quality among the coastal embayments in San Diego County.

Mission Bay

Mission Bay – Tecolote Creek Fecal Coliform, Total Suspended Solids Diazinon - last two storms lower concentrations detected 0.07 and 0.05 ug/l Trends to watch – increasing concentrations of arsenic (dissolved and total) concentrations still below WQO.

Bioassessment – Mission Bay Rose Creek, downstream of Highway 52 – very poor in spring, Poor in fall Rose Creek, downstream of Highway 52 – very poor in spring, Poor in fall Tecolote Creek in Tecolote Canyon Natural Park – Very Poor in spring, Poor in fall Tecolote Creek in Tecolote Canyon Natural Park – Very Poor in spring, Poor in fall

ABLM – Mission Bay 7 of 9 metals were detected with arsenic, copper, and lead exceeding ERL values. 7 of 9 metals were detected with arsenic, copper, and lead exceeding ERL values. No sediment toxicity No sediment toxicity Good benthic community Good benthic community

San Diego River

Fecal coliform Turbidity (5/9) Chlorpyrifos – detected last year above limit in all storms was non-detect for this seasom

Bioassessment – San Diego River Mission Trails Regional Park – IBI Poor Mission Trails Regional Park – IBI Poor Near Morena Blvd. in Mission Valley – IBI Very Poor Near Morena Blvd. in Mission Valley – IBI Very Poor The Mission Valley site was the lowest rated site in the San Diego County Stormwater program for both the October and May surveys.

ABLM – San Diego River No ABLM monitoring location No ABLM monitoring location

San Diego Bay

Chollas Creek Fecal coliform, turbidity, diazinon, copper, zinc Lead above WQO last three storm events. Increasing trend for lead. Some continued toxicity to Hyalella No ceriodaphnia toxicity in last 4 storm events Trends – TSS, TDS, dissolved nickel decreasing trends Nitrate and lead increasing trend Nitrate and lead increasing trend

Sweetwater River Fecal coliform, Total dissolved solids, Diazinon (6/9) two of last three events

Bioassessment – San Diego Bay Chollas Creek at Federal Blvd – Poor and very poor Chollas Creek at Federal Blvd – Poor and very poor Sweetwater River, at Highway 94 in Rancho San Diego - very poor Sweetwater River, at Highway 94 in Rancho San Diego - very poor Sweetwater River along Bonita Road – very poor Sweetwater River along Bonita Road – very poor The Sweetwater River sites had in-stream physical characteristics that provided little stable habitat for macroinvertebrate colonization, which may have negatively affected the IBI scores.

ABLM – San Diego Bay WMA Sweetwater Estuary Sweetwater Estuary 7 of 9 metals were detected copper and zinc exceeded ERLs 7 of 9 metals were detected copper and zinc exceeded ERLs High toxicity High toxicity Good benthic community Good benthic community Based on these results, Sweetwater River Estuary ranked third lowest among the coastal embayments in San Diego County.

Tijuana

Tijuana

Tijuana Tijuana

Tijuana Fecal coliform, ammonia, BOD, COD, Total phosphorus, Total suspended solids, turbidity Chlorpyrifos (6/9), diazinon (9/9) malathion Toxicity to ceriodaphnia (9/9)

Tijuana River - TIEs Three compounds were singled out as being consistently associated with the toxic fraction of Tijuana River storm water during the investigation; diazinon, methyl dihydrojasmonate, and quinoline and its byproducts. These three compounds were again identified and confirmed as contributing to toxicity in the monitoring season. Three compounds were singled out as being consistently associated with the toxic fraction of Tijuana River storm water during the investigation; diazinon, methyl dihydrojasmonate, and quinoline and its byproducts. These three compounds were again identified and confirmed as contributing to toxicity in the monitoring season.

Bioassessment – Tijuana River Campo Creek - May The Index of Biotic Integrity rating Poor Campo Creek - May The Index of Biotic Integrity rating Poor BUT there were several organisms collected that were otherwise found only at reference sites, and specific conductance was very low. The in-stream habitat of the site was marginal with anoxic silt deposits, and this may have prohibited the full colonization potential of macroinvertebrates. BUT there were several organisms collected that were otherwise found only at reference sites, and specific conductance was very low. The in-stream habitat of the site was marginal with anoxic silt deposits, and this may have prohibited the full colonization potential of macroinvertebrates.

ABLM – Tijuana River 6 metals detected none exceeded ERLs. 6 metals detected none exceeded ERLs. No sediment toxicity No sediment toxicity Benthic Community – Fair Benthic Community – Fair Based on these results, Tijuana River Estuary ranked second best among the coastal embayments in San Diego County.

TIEs for Chollas Creek (hyalella) Chollas Creek (hyalella) Sweetwater River (selenastrum – complete TIE) Sweetwater River (selenastrum – complete TIE) Agua Hedionda (ceriodaphnia) – Watch for toxicity…. Agua Hedionda (ceriodaphnia) – Watch for toxicity…. Tijuana River – Finished Tijuana River – Finished

MEC