We have also set water quality standards for all contaminants in surface waters.

At the other 15 stations, only the surface waters were sampled.

Natural surface waters should not stray much from neutral anyway.

Thus she also carries information to creatures that make their homes in the surface waters.

This is expected since the air and surface waters approach thermal equilibrium.

This range expansion may be due to the warming of the surface waters.

The fish commonly are found in the upper water column near the surface waters.

A fourth color on the map, blue, is used across the state to depict surface waters.

At a minimum, all systems using surface waters must disinfect.

This may lead to contamination of the soil, groundwater and surface waters.

But something - perhaps cooling of the surface waters - caused the two layers to mix.

Sewage is treated to control water pollution before discharge to surface waters.

The bright blue-green of the surface waters faded into gray.

Sea ice starts to form when surface waters are at freezing point and turbulence is low.

Waste heat from factories and reactors warmed the surface waters.

The warm surface waters were no more, replaced by chill drafts from far below.

These may be found in surface waters containing nitrogenous matter from sewage.

Out at sea, they stay in the surface waters, venturing no deeper than 10 metres down.

Surface waters and groundwater are protected by a number of different regulatory controls.

Prior to the settlement, more than 90% of the state's surface waters were not required to be clean enough for safe recreational use.

While plankton are most abundant in surface waters, they live throughout the water column.

While waste is being discharged into the lake surface waters are routed around it.

The main water sources are the surface waters.

It is found in surface waters of temperate and tropical oceans throughout the world.

But the surface waters are constantly disturbed by winds.

That's the same order as five percent of Earth's surface water.

The Government gave the church rights to surface water in exchange.

Surface water quality has been an issue, especially when we're in a drought.

As a result, he said, it is not ordinarily found in surface water.

Back when Mars had surface water and an atmosphere, life did begin.

Probably this one has fed in surface waters at another season.

While in these surface waters they drift with the current.

These problems may be for surface water, groundwater, or the combination.

As a result these upland areas have very little surface water.

California recognizes several different types of rights to take and use surface water.

It also turned back a move to weaken standards for ground and surface water.

The distinction between groundwater and surface water is not always clear.

There is no such a charge for surface water abstraction, however.

At times, there was enough surface water for gardening by the springs.

This process also takes place when the land is irrigated by surface water.

There are also ways of using surface water resources such as rainwater.

For this reason, there are no longer any naturally occurring surface water.

Bring attention to surface water quality problems by exploring some of these science fair project ideas.

The planet was predominantly gray, with far less surface water than Earth.

There was no surface water, only a single deep well with a coping of limestone.

It was able to survive without any surface water while feeding on green plants.

Surface water has lost its unique character due to impact of human activity.

On the other hand, surface water is usually polluted and requires treatment.

She pulled the nose up until the gauge showed 105 feet of surface water.

Thus, there is almost no source of surface water.