How do Del Valle algae advisory levels combine with the now-defined bacterial traffic-light designation?

gap · gap-del-valle-stoplight-meanings

Green/yellow/red bacterial meanings are now defined, but the source does not explain how a simultaneous algae Caution or Danger changes allowed activities.

Open question. The following evidence does not resolve this gap. Use the recorded question and reason to understand what needs confirmation.

Claims and evidence

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

Recorded observations

Browse observations separately (1)

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.

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Historical evidence is not a guarantee of current conditions.