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1
LocationLocation
Location with additional info
StateCountySpeciesDetails
Date first observed or published
News linkphoto link
2
30.392067, -88.066772Off the coast Off the coastAlabamaalgaeLargest dead zone ever observed8/2/2017
http://news.nationalgeographic.com/2017/08/gulf-mexico-hypoxia-water-quality-dead-zone/
3
59.614340, -151.372129
Kachemak BayKachemak BayAlaska
paralytic toxic algae
Health officials found toxic algae in shellfish8/3/2017
http://www.homernews.com/news/2017-08-03/psp-alert-issued-bay
4
33.581619, -111.256176
Apache LakeApache LakeArizona
golden algae
Bloom killed thousands of shad3/1/2017
http://science.kjzz.org/content/444646/algal-toxin-kills-thousands-fish-apache-lake
5
33.571394, -111.534943Saguaro LakeSaguaro LakeArizona
golden algae
Large bloom reported, forced cancellation of fishing tournament, later caused taste and odor problems in drinking water
5/1/2017
https://www.azgfd.com/fishing-tournaments-temporarily-suspended-on-apache-canyon-and-saguaro-lakes/
6
33.540862, -111.435352Canyon LakeCanyon LakeArizona
golden algae
Fishing tournament canceled5/29/2017
http://www.azfamily.com/story/35540536/fishing-tournaments-temporarily-suspended-on-apache-canyon-and-saguaro-lakes
7
34.673226, -92.999865Lake IsabellaLake Isabella ArkansasAlgaeModerate levels of Microcystin found8/15/2017
http://www.hsvvoice.com/news/20170815/lake-survey-finds-thousands-in-lost-boat-sticker-revenue
8
36.344725, -93.927639Beaver Lake Beaver LakeArkansas
algae bloom
Beaver Water District says algae blooms causing taste issues in water9/12/2917
http://www.4029tv.com/article/beaver-lake-is-turning-over/12230945
9
33.503, -115.9Salton Sea, Varner Harbor
Salton Sea, Varner Harbor
CaliforniaImperial
Anatoxin-A
Toxins found at Varner Harbor2/15/2017
10
33.504, -115.9Salton Sea, North Shore Beach
Salton Sea, North Shore Beach
CaliforniaRiverside
Anatoxin-A
Toxins found at North Shore Beach2/28/2017
11
33.518, -115.9Salton Sea, Riverside County
Salton Sea, Riverside County
CaliforniaRiverside
Anatoxin-A
Samples at lagoon near harbor show cyanobacteria2/28/2017
12
33.846, -117.1Wetlands near Marvin Road
Wetlands near Marvin Road
CaliforniaRiverside
Algae bloom
Report of algae bloom in dog training area, area closed3/3/2017
13
33.672, -117.4Lake ElsinoreLake ElsinoreCaliforniaRiverside
Cyanobacteria
High levels found near Laguna Boat Launch4/7/2017
14
33.813, -118.1Horseshoe Lake
Horseshoe Lake
CaliforniaLos Angeles
Cyanobacteria
Bloom present15-Apr
15
33.825, -118.1
Northern pond near Sycamore Grove
Northern pond near Sycamore Grove
CaliforniaLos Angeles
cynobacteria and anatoxins
Bloom and fish kill reported4/16/2017
16
33.816, 118.1Lake near Wardlow Road
Lake near Wardlow Road
CaliforniaLos Angeles
Cyanobacteria
Found at low levels4/18/2017
17
35.465, -120.7Atascadero Lake
Atascadero Lake
California
San Luis Obispo
Microcystin, Saxitoxin, Anitoxin-A
Scum along edge of lake contains low levels of dangerous neurotoxins4/20/2017
18
37.883, -122.5Richardson BayRichardson BayCaliforniaMarin
Common filamentous alage
Bloom observed over small area5/1/2017
19
33.659, -117.8
San Joaquin Marsh and Wildlife Sanctuary, near Campus Drive
San Joaquin Marsh and Wildlife Sanctuary, near Campus Drive
CaliforniaOrange
Cyanobacteria
Bloom observed5/2/2017
20
34.043, -118.7Malibu CreekMalibu CreekCaliforniaLos Angeles
Dense algae bloom
Citizen reported rash and stomach distress after swimming near bloom5/10/2017
21
38.608, -121.5
Natomas East Main Drainage, Steelhead Creek
Natomas East Main Drainage, Steelhead Creek
CaliforniaSacramento
Cyanobacteria
Cyclist spotted bloom, may have moved downstream5/21/2017
22
34.578, 120.0Cachuma LakeCachuma LakeCaliforniaSanta Barbara
Microcystins, Anatoxins
Toxins found in lake5/22/2017
23
39.003, -122.8Clear Lake, Soda Bay
Clear Lake, Soda Bay
CaliforniaLake
Microcystin
Citizen reported via Bloomwatch app a football field-sized bloom5/30/2017
24
39.019, -122.7Clear Lake, Clearlake Oaks
Clear Lake, Clearlake Oaks
CaliforniaLake County
Cyanobacteria
Lake wide bloom of bright blue green algae5/30/2017
25
37.335, -121.8Lake Cunningham
Lake Cunningham
CaliforniaSanta Clara
Microcystin
Microcystin detected in 2016 and every week so far in 20175/31/2017
26
37.669, -121.8Shadow Cliff Lake
Shadow Cliff Lake
CaliforniaAlameda
Cyanobacteria
Visual bloom occurring along shoreline6/2/2017
27
33.755, -117.1Hemet Golf Course Pond
Hemet Golf Course Pond
CaliforniaRiverside
Algae bloom
Pungent algae bloom reported, tests under way6/3/2017
28
37.896, -122.3Lake AnzaLake AnzaCaliforniaAlameda
Cyanobacteria
Small amount visible at lake6/5/2017
29
37.669, -121.8Shadow CliffsShadow CliffsCaliforniaAlameda
Cyanobacteria
Small amount visible at lake, including Anotoxin-A6/6/2017
30
37.772457122803, -122.46003723145
Lily PondLily PondCalifornia
algae bloom
Bloomwatch report6/6/2017
http://www.citsci.org/cwis438/Browse/Project/Visit_Info.php?VisitID=1554952&ProjectID=822
31
37.573, -122.0Quarry LakesQuarry LakesCaliforniaAlameda
Cyanobacteria
Lake closed due to bloom6/9/2017
32
37.727, -122.1Lake ChabotLake ChabotCaliforniaAlameda
Cyanobacteria
Cynobacteria spreading across lake6/9/2017
33
39.802, -122.4Black Butte Lake
Black Butte Lake
CaliforniaGlenn
Blue green algae
Detected in lake6/9/2017
34
34.021, -118.831Zuma BeachZuma BeachCalifornia
algae bloom
Bloomwatch report6/11/2017
http://www.citsci.org/cwis438/Browse/Project/Visit_Info.php?VisitID=1554825&ProjectID=822
http://www.citsci.org/UserUploads/9813/MobileData/1497273840_Zuma%20Beach/Zuma%20Beach_photo1.png
35
39.715, -122.2Unnamed Ski Lake
Unnamed Ski Lake
CaliforniaLake
Anatoxin-A
Private landowner reported bloom in lake after a dog died 48 hours after exposure, two other neighbors reporting dog illnesses
6/12/2017
36
34.366, -114.2Lake Havasu near Vickie's Beach
Lake Havasu near Vickie's Beach
CaliforniaRiverside
Microcystins
Microcystins detected in lake6/13/2017
37
34.436, -114.3Colorado River, Lake Havasu outlet
Colorado River, Lake Havasu outlet
CaliforniaRiverside
Microcystins
Microcystins detected in river6/13/2017
38
34.457, -114.4Lake Havasu, southern end
Lake Havasu, southern end
CaliforniaRiverside
Microcystins
Microcystins detected in lake6/13/2017
39
34.512, -114.4Lake Havasu near Chemehuevi Park
Lake Havasu near Chemehuevi Park
CaliforniaRiverside
Microcystins
Microcystins detected in lake6/13/2017
40
34.527, -114.4Colorado River, Catfish Bay
Colorado River, Catfish Bay
CaliforniaRiverside
Cyanobacteria
Microcystins detected in river6/13/2017
41
37.586, -121.7Lake del ValleLake del ValleCaliforniaAlamedaAnatoxinDetected at boat launch6/13/2017
42
34.298, -114.1Colorado River, Parker Dam Road
Colorado River, Parker Dam Road
CaliforniaRiverside
Microcystins
Microcystins detected in river6/14/2017
43
39.173, -123.0Upper Blue Lake
Upper Blue Lake
CaliforniaLake
Cyanobacteria
Residents report scum along lake, tests confirm toxins, lake unusally warm6/14/2017
44
38.369, -121.5Stone LakesStone LakesCaliforniaLake
Microcystin, Saxitoxin, Anitoxin-A
Abundant toxins found, Stone Lakes NWR cancels all paddling tours6/16/2017
45
37.037, -121.1San Luis Reservoir, Basalt Road
San Luis Reservoir, Basalt Road
CaliforniaMerced
Microcystin
Microcystin found, warnings posted6/19/2017
46
38.949, -122.7Clear Lake, Bayliss Point
Clear Lake, Bayliss Point
CaliforniaLake County
Cyanobacteria
Blue, white and green algae reported6/19/2017
47
33.125, -117.2Lake San Marcos
Lake San Marcos
CaliforniaSan Diego
Algae bloom
Bloom reported on privately owned lake6/20/2017
48
35.649, -118.4Lake Isabella, Kissack Cove
Lake Isabella, Kissack Cove
CaliforniaKernAnatoxinAnatoxin-A and Microcystin found after health officials found thick green mats of scum6/20/2017
https://kernvalleysun.com/news/blue-green-algae-bloom
49
35.653, -118.4Lake Isabella, Paradise Cove
Lake Isabella, Paradise Cove
CaliforniaKernAnatoxinAnatoxin-A and Microcystin found after reports of thick green mats6/20/2017
50
38.276, -121.8Barker SloughBarker SloughCaliforniaSolano
Microcystin
Low levels reported near water pumping plant6/20/2017
51
39.264, -123.0Lower Blue Lake
Lower Blue Lake
CaliforniaMendocino
Cyanobacteria
Bloom identified, testing under way6/21/2017
52
34.661, -118.8Pyramid LakePyramid LakeCaliforniaLos Angeles
Microcystin
Low levels reported6/23/2017
http://www.nbclosangeles.com/news/local/Avoid-Water-Pyramid-Lake-Toxic-Algal-Bloom-433220463.html
53
37.847, -122.2Lake TemescalLake TemescalCaliforniaAlameda
Fliamentous algae
Officials cleared algae from beach, Microystin detected, beach closed6/26/2017
54
41.983, -122.3Copco Reservoir
Copco Reservoir
CaliforniaSiskiyou
Microcystin
Routine monitoring revealed Microcystin levels, triggering an alert6/27/2017
http://www.times-standard.com/article/NJ/20170713/NEWS/170719918
55
35.813, -120.9Lake San Antonio
Lake San Antonio
CaliforniaMonterey
Microcystin
Health officials testing for toxins, Microcystin found6/29/2017
56
37.892, -121.6Discovery Bay near Newport Drive
Discovery Bay near Newport Drive
CaliforniaContra Costa
Microcystin
Resident reported bloom, Microcystin found6/30/2017
http://eastcountytoday.net/county-health-services-urges-discovery-bay-residents-to-be-cautious-for-blue-green-algae/
57
38.201, -122.3Huichica Pond, Napa River
Huichica Pond, Napa River
CaliforniaNapa
Algal toxin
Health department reported 2 dog deaths6/30/2017
http://www.sacbee.com/news/state/california/water-and-drought/article159345924.html
58
34.283, -117.3Silverwood Lake
Silverwood Lake
California
San Bernadino
Microcystins
Health officials identified Microcystins near beach7/11/2017
http://abc7.com/news/silverwood-lake-closed-to-swimmers-due-to-toxic-algae/2218723/
59
34.542, -118.6Castaic LakeCastaic LakeCaliforniaLos Angeles
Microcystin
Toxins found near boat launch7/11/2017
60
41.028, -121.7Lake BrittonLake BrittonCaliforniaShasta
Cyanobacteria
Health officials observed bloom and scum at boat launch7/13/2017
61
38.521, -122.2Lake Berryessa Spanish Flat
Lake Berryessa Spanish Flat
CaliforniaNapa
algae bloom
Dog death reported7/15/2017
62
35.177532, -120.742497Cal Poly Pier, Avila Beach
Cal Poly Pier, Avila Beach
California
Harmful algae species
Three species detected in routine monitoring7/17/2017
63
33.605932, -117.928627Newport Pier, California
Newport Pier, California
California
Harmful algae species
7/18/2017
64
34.006864, -118.497352
Santa Monica Pier, California
Santa Monica Pier, California
California
Harmful algae species
Three species detected in routine monitoring7/18/2017
65
41.934, -122.4Iron Gate Reservoir
Iron Gate Reservoir
CaliforniaSiskiyou
Microcystin
Routine monitoring revealed Microcystin, triggering alert7/18/2017
66
38.916, -122.6Copsey CreekCopsey CreekCaliforniaLake
Microcystin
Residents reported bloom, Microcystin found7/19/2017
http://www.lakeconews.com/index.php/news/51701-harmful-algal-bloom-discovered-in-copsey-creek
67
36.814045, -121.758509
Elkhorn Slough, California
Elkhorn Slough, California
CaliforniaMonterey
Algae bloom
White crust of algae reported7/20/2017
http://www.mercurynews.com/2017/07/10/whats-that-white-ring-around-elkhorn-slough-dead-algae-is-killing-the-marsh/
68
39.175189971924, -123.20263671875
ClearlakeClearlakeCalifornia
Algae bloom
Bloomwatch report7/22/2017
http://www.citsci.org/cwis438/Browse/Project/Visit_Info.php?VisitID=1559550&ProjectID=822
http://www.citsci.org/UserUploads/11356/MobileData/1500921522_Clearlake/Clearlake_photo3.png
69
34.242, -117Lake GregoryLake GregoryCalifornia
San Bernadino
PendingHuman illness reported7/27/2017
70
36.561, -118Diaz LakeDiaz LakeCaliforniaInyo
Cynaobacteria
Green, paint-like appearance observed on lake7/28/2017
71
38.466121, -123.010538
Patterson Point, Monte Rio, Russian River
Patterson Point, Monte Rio, Russian River
CaliforniaSonoma
Harmful algae species
8/1/2017
http://www.petaluma360.com/news/7273647-181/harmful-algae-still-a-problem?artslide=2
72
38.822148, -123.010013Cloverdale River Park, Russian River
Cloverdale River Park, Russian River
CaliforniaSonoma
Harmful algae species
8/1/2017
http://www.petaluma360.com/news/7273647-181/harmful-algae-still-a-problem?artslide=3
73
38.499359, -122.899026
Steelhead Beach, Russian River
Steelhead Beach, Russian River
CaliforniaSonoma
Harmful algae species
8/4/2017
http://www.petaluma360.com/news/7273647-181/harmful-algae-still-a-problem?artslide=0
74
38.499481, -122.997473Johnson's Beach, Russian River
Johnson's Beach, Russian River
CaliforniaSonoma
Harmful algae species
Anatoxin-A8/4/2017
http://www.petaluma360.com/news/7273647-181/harmful-algae-still-a-problem?artslide=1
75
35.154972, -120.728647San Luis Obispo
San Luis Obispo
California
Domoic acid
Sea lions washing up shore dead8/9/2017
http://www.sfchronicle.com/bayarea/article/Sea-lions-wash-ashore-in-California-amid-return-11746260.php
http://ww3.hdnux.com/photos/64/10/37/13666250/3/920x920.jpg
76
34.524, -119Castaic Lake
Castaic Lake at Castaic Outlet
CaliforniaLos Angeles
Microcystins
Samples found in July, non-detect in August8/11/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
77
38.01, -121.7Big Break Regional Shoreline
Big Break Regional Shoreline
CaliforniaContra CostaAlgaeSmall bloom reported, monitoring under way8/11/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
78
38.498506, -121.097212
Laguna JoaquinLaguna JoaquinCalifornia
blue-green algae
Lake treated, fish kill8/11/2017
https://ranchomurieta.com/stories/csd-answers-questions-about-fish-kill
79
39.413, -123Lake PillsburyLake PillsburyCaliforniaLake
cyanotoxin
Cyanotoxin cylindroperpersmopsin found, advisory posted8/17/2017
80
38.939745, -120.013115
Lake TahoeLake TahoeCalifornia
cyanobacteria
Warnings about potential blooms8/19/2017
http://www.tahoedailytribune.com/news/toxic-algae-detected-in-some-tahoe-keys-waterways/
81
34.527, -114.4Klamath River Klamath RiverCaliforniaSiskiyou
Microcystin
Routine monitoring found toxin8/23/2017
82
41.186, -123.7Klamath RiverKlamath RiverCaliforniaHumbolt
Microcystin
Routine monitoring found toxin8/23/2017
83
41.823, -123.0Klamath River
Klamath River at Brown Bear River
CaliforniaSiskiyou
Microcystin
Routine monitoring found toxin8/23/2017
84
41.857, -122.6Klamath River
Klamath River at I-5 rest stop
CaliforniaSiskiyou
Microcystin
Routine monitoring found toxin8/23/2017
85
37.241, -121.9Lake AlmadenLake AlmadenCaliforniaSanta ClaraSaxitoxinLake has very high levels of saxitoxin 8/24/2017
86
41.774, -123.4Klamath River
Klamath River below Happy Camp
CaliforniaSiskiyou
Microcystin
Routine monitoring found toxin8/24/2017
87
-41.842, -123.2Klamath River
Klamath River below Seiad Valley
CaliforniaSiskiyou
Microcystin
Routine monitoring found toxin8/25/2017
88
38.090027, -122.559590
Scottsdale Pond
Scottsdale Pond
CaliforniaMarin
cyanobacteria
Fish kill reported8/25/2017
http://www.marinij.com/environment-and-nature/20170824/novatos-scottsdale-pond-plagued-with-algae-bloom
89
37.053073, -121.123683San Luis Reservoir
San Luis Reservoir Basalt Boat Landing
California
cyanobacteria
Water sampled at the Basalt boat launch area on August 28 contained the algal toxin microcystin above the “danger” advisory level.
8/28/2017
http://mountainenterprise.com/story/labor-day-update-on-algal-bloom-in-pyramid-and-castaic-lakes/
90
40.530993, -124.113124
Van Duzen river
Van Duzen River
CaliforniaHumbolt
cyanobacteria
Toxins found in river, 11 documented dog deaths in area rivers since 2011 becaues of poisonings9/1/2017
http://www.krcrtv.com/north-coast-news/dhhs-blue-green-algae-in-humboldt-water/615554814
91
41.170072, -124.111933Big LagoonBig LagoonCaliforniaHumbolt
cyanobacteria
Toxins found in lagoon, 11 documented dog deaths in area rivers since 2011 becaues of poisonings9/1/2017
http://www.krcrtv.com/north-coast-news/dhhs-blue-green-algae-in-humboldt-water/615554814
92
40.619065, -124.281648
Eel RiverEel RiverCaliforniaHumbolt
cyanobacteria
Toxins found in river, 11 documented dog deaths in area rivers since 2011 becaues of poisonings9/2/2017
http://www.krcrtv.com/north-coast-news/dhhs-blue-green-algae-in-humboldt-water/615554814
93
37.614340, -121.745444
Arroyo del Valley in Shadow Cliffs Regional park
Arroyo del Valley in Shadow Cliffs Regional park
CaliforniaAlameda
Lyngbya cyanobacteria
Visible but toxins not detected9/5/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
94
37.572441, -122.004506Quarry LakesQuarry LakesCaliforniaAlameda
cyanobacteria
Caution advisory9/7/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
95
38.510871, -122.923195Forestville Access Beach
Forestville Access Beach, Russian River
CaliforniaSonoma
cyanobacteria
Caution signs erected. 9/7/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
96
38.603172, -122.860281Healdsburg Veterans Beach
Healdsburg Veterans Beach
CaliforniaSonomacyCaution signs erected. 9/7/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
97
38.613087, -122.831428Camp Rose Beach
Camp Rose Beach Russian River
CaliforniaSonoma
algae bloom
Caution signs erected. 9/7/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
98
38.823278, -123.009222Cloverdale River Park Beach
Cloverdale River Park Beach
CaliforniaSonoma
cyanobacteria
cyanobacteria found and caution signs erected9/7/2017
http://www.mywaterquality.ca.gov/habs/where/freshwater_events.html
99
33.816395, -118.085601
El Dorado Regional Park
El Dorado State Park
CaliforniaalgaeLake treated for algae bloom, fish kill reported9/8/2017
http://www.presstelegram.com/environment-and-nature/20170907/dead-fish-discovered-at-el-dorado-regional-park-in-long-beach
100
38.023360, -122.098834McNabney Marsh
McNabney Marsh
California
Contra Costa
Bloom reported
Bloom reported. Website describes issues: 9/12/2017
http://www.mvsd.org/wetlands/mcnabney-marsh/