East Bay Regional Park District

source · source-ebrpd-current-water-quality

Original source: East Bay Regional Park District

Claims and evidence

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
danger advisory
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-big-break-shoreline

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
no advisory posted
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-contra-loma-reservoir

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Status
no advisory posted
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-beach-crown

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Swimming advisory

caution
Evidence and sources (4)

Claim effective interval: 2026-09-20 to 2026-09-20

Spatial scope IDs: scope-del-valle-east-beach

  1. Evidence stance: supports · Evidence details

    At retrieval, the EBRPD page posted a blue-green algae Caution Advisory for the East Swim Beach and stated that the West Swim Beach had no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  2. Evidence stance: supports · Evidence details

    At retrieval, the current-conditions table listed a Caution Advisory for the Del Valle East Swim Beach and no advisory for the West Swim Beach, where it reported no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  3. Evidence stance: supports · Evidence details

    At retrieval, East Beach had a blue-green algae Caution Advisory and West Beach had no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  4. Evidence stance: supports · Evidence details

    At retrieval, the table listed a Caution algae advisory at Del Valle East Beach and no advisory at West Beach, where there was no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

Water availability

no water
Evidence and sources (4)

Claim effective interval: 2026-09-20 to 2026-09-20

Spatial scope IDs: scope-del-valle-west-beach

  1. Evidence stance: supports · Evidence details

    At retrieval, the EBRPD page posted a blue-green algae Caution Advisory for the East Swim Beach and stated that the West Swim Beach had no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  2. Evidence stance: supports · Evidence details

    At retrieval, the current-conditions table listed a Caution Advisory for the Del Valle East Swim Beach and no advisory for the West Swim Beach, where it reported no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  3. Evidence stance: supports · Evidence details

    At retrieval, East Beach had a blue-green algae Caution Advisory and West Beach had no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  4. Evidence stance: supports · Evidence details

    At retrieval, the table listed a Caution algae advisory at Del Valle East Beach and no advisory at West Beach, where there was no water because of low lake levels.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    2026-09-20T00:00:00+00:00
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

Del valle beach monitoring

April october
weekly
November march
twice monthly
Sample sites per beach
2
Sign inputs
  • bacteria
  • blue green algae
Evidence and sources (2)

No claim effective interval recorded.

Spatial scope IDs: scope-lake-del-valle

  1. Evidence stance: supports · Evidence details

    Del Valle beaches are sampled for bacteria weekly April-October and twice monthly November-March, with two sample sites per beach. Posted stop-light signs combine latest bacteriological tests and blue-green algae conditions.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    Unknown
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

  2. Evidence stance: supports · Evidence details

    EBRPD routinely monitors recreational and drinking water, storm water, wastewater, lakes and creeks, and responds to sewage, oil, and hazardous-material incidents. Natural swim areas are sampled weekly April-October in collaboration with county environmental-health departments, with current data posted for safe recreation choices.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    Unknown
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

Water quality program scope

  • recreational water
  • drinking water
  • storm water
  • wastewater
  • lakes
  • creeks
  • water related emergencies
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-ebrpd-water-quality-program

  1. Evidence stance: supports · Evidence details

    EBRPD routinely monitors recreational and drinking water, storm water, wastewater, lakes and creeks, and responds to sewage, oil, and hazardous-material incidents. Natural swim areas are sampled weekly April-October in collaboration with county environmental-health departments, with current data posted for safe recreation choices.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    Unknown
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

Bacterial stoplight meanings

Green
indicator results below maximums meet state standards
Indicators
  • total coliform
  • fecal coliform
  • Enterococcus
  • E coli
Red
beach closed for water quality issue
Yellow
one or more indicators exceed daily maximum
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-ebrpd-water-quality-program

  1. Evidence stance: supports · Evidence details

    California swim-water evaluation uses total coliform, fecal coliform, Enterococcus, and E. coli indicators. Green means results are below maximums and meet state standards; yellow means one or more indicators exceeds a daily maximum; red means the beach is closed for a water-quality issue and visitors must not enter.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    user-supplied page transcription
    Observed at
    Unknown
    Retrieved at
    2026-09-20T00:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

Water quality status

As of retrieval
2026-09-22
Status
water advisory
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-beach-keller

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
caution advisory
Volatile
Yes
Water contact rule
swimming never permitted
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-reservoir-lake-chabot

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
caution advisory
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-lake-temescal

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
danger advisory
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-martinez-shoreline

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
no advisory posted
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-shadow-cliffs-arroyo

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
caution advisory
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-shadow-cliffs-lake

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Water quality status

As of retrieval
2026-09-22
Hazard
blue-green algae
Status
no advisory posted
Volatile
Yes
Evidence and sources (1)

Claim effective interval: No start bound to No end bound

Spatial scope IDs: scope-waterbody-tilden-lake-anza

  1. Evidence stance: supports · Evidence details

    Evidence notes: Volatile official status; recheck before water contact or travel.

    The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

    Publisher
    East Bay Regional Park District
    Observer / attribution
    Wayproof live source review
    Observed at
    Unknown
    Retrieved at
    2026-09-22T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: East Bay Regional Park District

    Recorded artifact references
    • Water Quality Notices table

    References are not a confirmation of current availability.

Recorded observations

Browse observations separately (4)

The live Current Water Quality Conditions table reported the location-specific advisory states represented by the associated claims.

Publisher
East Bay Regional Park District
Observer / attribution
Wayproof live source review
Observed at
Unknown
Retrieved at
2026-09-22T21:00:00+00:00

Retrieval time does not establish when an event occurred.

Observation details · Source details · Original source: East Bay Regional Park District

Recorded artifact references
  • Water Quality Notices table

References are not a confirmation of current availability.

At retrieval, the table listed a Caution algae advisory at Del Valle East Beach and no advisory at West Beach, where there was no water because of low lake levels.

Publisher
East Bay Regional Park District
Observer / attribution
user-supplied page transcription
Observed at
2026-09-20T00:00:00+00:00
Retrieved at
2026-09-20T00:00:00+00:00

Retrieval time does not establish when an event occurred.

Observation details · Source details · Original source: East Bay Regional Park District

EBRPD routinely monitors recreational and drinking water, storm water, wastewater, lakes and creeks, and responds to sewage, oil, and hazardous-material incidents. Natural swim areas are sampled weekly April-October in collaboration with county environmental-health departments, with current data posted for safe recreation choices.

Publisher
East Bay Regional Park District
Observer / attribution
user-supplied page transcription
Observed at
Unknown
Retrieved at
2026-09-20T00:00:00+00:00

Retrieval time does not establish when an event occurred.

Observation details · Source details · Original source: East Bay Regional Park District

California swim-water evaluation uses total coliform, fecal coliform, Enterococcus, and E. coli indicators. Green means results are below maximums and meet state standards; yellow means one or more indicators exceeds a daily maximum; red means the beach is closed for a water-quality issue and visitors must not enter.

Publisher
East Bay Regional Park District
Observer / attribution
user-supplied page transcription
Observed at
Unknown
Retrieved at
2026-09-20T00:00:00+00:00

Retrieval time does not establish when an event occurred.

Observation details · Source details · Original source: East Bay Regional Park District

Published record history

History lists published operations; it does not reconstruct removed content or confirm that external media remains available.

JSON

Historical evidence is not a guarantee of current conditions.