[kenhwang]

Owens valley, where LA "steals" water from, is on the eastern side of the Sierras.

NorCal, including Sacramento, is on the western side of the Sierras.

So unless they planned on pumping the water over/under the mountain range that surrounds it in every direction except for towards LA, that water was never available for any NorCal city to use.

[mutagen]

The California Aqueduct delivers water from the western Sierras through the Central Valley and to Los Angeles. This is likely what NorCal refers to when they say SoCal is 'stealing our water'.

https://en.wikipedia.org/wiki/California_Aqueduct

Would be interesting to see the relative amounts of use by LA and by agriculture in the Central Valley though.

[kenhwang]

SoCal does, yes; about half the water going through the SWP from NorCal, or ~75% if you include Bakersfield/Kern as part of SoCal (though most would consider it Central Valley).

But SoCal isn't only LA. LA itself gets a bit less than half of their water from MWP, which manages the water from the SWP and the Colorado. About the same amount it gets from the the eastern Sierras. These are supposed to drop to ~10% of LA's water supply as recapture/recycling projects complete.

Or computed the other way around, LA only has rights to ~20% of the water managed by MWD. Of course water supply, distribution, and rights are all blended and traded around all the time, but generally speaking it's not "LA" using up that water from NorCal, the consumption is significantly more from the cities and farms that came after.

[nostrademons]

This infographic basically explains it:

https://www.ppic.org/publication/water-use-in-california/

tl;dr: Urban water use is tiny. In NorCal, the vast majority of the water flows unimpeded to the sea. In the Central Valley, most water is used for agriculture. Agricultural water use in any one of the 3 major basins in the Central Valley is more than all urban areas in California combined. Unsurprisingly, urban use is the primary one in the SF and LA areas, but the absolute totals are very small compared to total CA water supplies.

[newyankee]

Not just agriculture but highly water intensive agriculture like almonds. Also I read that a lot of laws about water in some US states contain so many grandfathered clauses that few people 'control' a lot of water use, not sure how much.

[stevep98]

The Los Angeles Aqueduct delivers water to LA.

The California Aqueduct is used for farmland in the central valley.

Two different things.

[vondur]

Owens valley is basically dried up from the water that LA takes. It's interesting as you drive in the towns in the Valley and you see all the LA Department of Water and Power offices over 200 miles from Los Angeles. The courts had to force the LA DWP to quit taking too much water from the streams that feed Mono Lake as it was in danger of drying out.

[kenhwang]

Yep, Owens valley is basically an environmental disaster created by LA. So in the grand scheme of things, buying water from NorCal is better than stealing from the Owens valley through antiquated water rights.

But really, California (and really the entire Western US) needs a water rights governance overhaul. Right now the focus is all on urban water use, which is practically negligible compared to the agricultural water rights usage.

[Spooky23]

That's a money play too. Some of the best farmland in the world is now the endless subarban Boston->DC corridor.

We created the miracle on the desert, and billions were made in real estate.

[paradox460]

Much easier to tell Joe homeowner he's not allowed to have a lawn than to close down the country club. Where would the rich relax then?

[ashdksnndck]

The country club is also negligible compared to agriculture. Farmers are politically not an attractive punching bag though.

[rayiner]

It’s funny how the above comment reveals exactly why the problem is politically intractable.

[kjkjadksj]

It isn’t dried up, they maintain a certain water level in the various lakes.

[bronson]

The lake is completely dried up. https://en.wikipedia.org/wiki/Owens_Lake And other lakes in the area are in really bad shape.

[kjkjadksj]

I disagree I drive through there every winter and the lakes are very large. The ecology of the valley is dry but nowhere near as dry as say the mojave just to the south.

[bronson]

Mojave was a desert. Owens Lake was huge. Your comparison doesn't make sense

What natural lakes in the region are still "very large"?

[jlhawn]

they are saying that LA takes water from sources which would otherwise drain into the sacramento and san joaquin river delta. The video from this post mentions the California State Water Project which takes water from the Feather River (Oroville Dam) and distributes it along the Western edge of the central valley South to Bakersfield where it is then pumped over the mountains both towards Los Angeles and further East to San Bernardino and Riverside. It provides way more water to SoCal than the two Los Angeles-specific aqueducts from the Owens Valley on the Eastern side of the Sierras.

[deaddodo]

The CWP is designed for robustness, on top of delivery. Those aqueducts you're pointing to that feed into the municipal portion of the Inland Empire are frequently empty because the IE has it's own (mostly) self-sufficient water store (the San Bernardino Mountains). They exist in case there is a point in which those regions need water fed in. You can literally just drive down to them at pretty much any time through the year and see that they're dry.

Additionally, if you're focused on the 6% (out of 11% total) water allocation that goes towards supporting the infrastructure of 22million people over the 50% that goes into non-optimal agriculture (almonds, for instance) in-between the two...then you're missing the forest for the trees, my friend.

[dgaultiere]

LA also gets water from the state water project which does come from northern california: https://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Ca...

[dpe82]

Old men yelling at the sky don't often seek rationality or nuance in their cries.