"Water Quality Indicator"

#12591832

27 July 2025

A senior woman with a walker stands near a pier at Lake Starnberg as dark clouds gather, indicating an approaching storm in Starnberg, Bavaria, Upper Bavaria, Germany, on July 27, 2025.

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#12551377

13 July 2025

A green flag signals to Parisians and tourists that swimming is permitted in the Seine, in Paris, France, on July 13, 2025.

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#11227478

11 May 2024

Workers are welding in a workshop of a smart water meter manufacturing company in the Qingzhou Economic Development Zone, in Qingzhou, China, on April 11, 2024. The National Bureau of Statistics released data indicating that in April 2024, the national industrial producer prices fell by 2.5% year on year.

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#11201221

1 May 2024

A woman is walking a long way to collect drinking water from a freshwater source in a coastal area in Khulna, Bangladesh, on April 27, 2024.

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#10852171

14 December 2023

A Damselflies Is Sitting On A Basil (Ocimum Tenuiflorum) Plant At Tehatta, West Bengal; India On 13/12/2023. Damselflies Are Flying Insects Of The Suborder Zygoptera In The Order Odonata. All Damselflies Are Predatory Insects; Both Nymphs And Adults Actively Hunt And Eat Other Insects. The Nymphs Are Aquatic, With Different Species Living In A Variety Of Freshwater Habitats Including Acidic Bogs, Ponds, Lakes And Rivers. Their Presence On A Body Of Water Indicates That It Is Relatively Unpolluted, But Their Dependence On Freshwater Makes Them Vulnerable To Damage To Their Wetland Habitats. Damselflies Have Existed Since The Jurassic, And Are Found On Every Continent Except Antarctica.

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#10852172

14 December 2023

A Damselflies Is Sitting On A Basil (Ocimum Tenuiflorum) Plant At Tehatta, West Bengal; India On 13/12/2023. Damselflies Are Flying Insects Of The Suborder Zygoptera In The Order Odonata. All Damselflies Are Predatory Insects; Both Nymphs And Adults Actively Hunt And Eat Other Insects. The Nymphs Are Aquatic, With Different Species Living In A Variety Of Freshwater Habitats Including Acidic Bogs, Ponds, Lakes And Rivers. Their Presence On A Body Of Water Indicates That It Is Relatively Unpolluted, But Their Dependence On Freshwater Makes Them Vulnerable To Damage To Their Wetland Habitats. Damselflies Have Existed Since The Jurassic, And Are Found On Every Continent Except Antarctica.

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#10852173

14 December 2023

A Damselflies Is Sitting On A Basil (Ocimum Tenuiflorum) Plant At Tehatta, West Bengal; India On 13/12/2023. Damselflies Are Flying Insects Of The Suborder Zygoptera In The Order Odonata. All Damselflies Are Predatory Insects; Both Nymphs And Adults Actively Hunt And Eat Other Insects. The Nymphs Are Aquatic, With Different Species Living In A Variety Of Freshwater Habitats Including Acidic Bogs, Ponds, Lakes And Rivers. Their Presence On A Body Of Water Indicates That It Is Relatively Unpolluted, But Their Dependence On Freshwater Makes Them Vulnerable To Damage To Their Wetland Habitats. Damselflies Have Existed Since The Jurassic, And Are Found On Every Continent Except Antarctica.

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#10852174

14 December 2023

A Damselflies Is Sitting On A Basil (Ocimum Tenuiflorum) Plant At Tehatta, West Bengal; India On 13/12/2023. Damselflies Are Flying Insects Of The Suborder Zygoptera In The Order Odonata. All Damselflies Are Predatory Insects; Both Nymphs And Adults Actively Hunt And Eat Other Insects. The Nymphs Are Aquatic, With Different Species Living In A Variety Of Freshwater Habitats Including Acidic Bogs, Ponds, Lakes And Rivers. Their Presence On A Body Of Water Indicates That It Is Relatively Unpolluted, But Their Dependence On Freshwater Makes Them Vulnerable To Damage To Their Wetland Habitats. Damselflies Have Existed Since The Jurassic, And Are Found On Every Continent Except Antarctica.

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