Falling Springs, Duarte, California, CA 91008

Here's where I revealed the location of the secret water source that I used to get my drinking water while in Los Angeles. It is the best water available. I recommend it to anyone who lives in Southern California.
To reach the top, go east from Los Angeles and take Highway 2 to Angeles national Forest. Continue driving for 35 miles, until you reach mile marker 65.28. From there, turn right onto Highway 2. Park there and then hike up the steep hill approximately 200 yards.
GPS coordinates are 34 20 41 N - 112 52 7 W
At mile marker 65.5, a trailhead leads to Little Jimmy Camp. The spring source is just a few miles beyond. The hike is approximately one mile and a half. This distance makes it hard to transport a lot of water back to your car. But, if you decide to choose the last option, here are the roadside GPS coordinates: 34 21 10 N-117 50 7 W
It doesn't matter what you do, the water is definitely worth it.
Here's a video showing me harvesting and talking to people on the spot:

PH 7.9
PPM 141
Ranger Station
Continue on asphalt road to juncture
Turn left toward Trask Scout Reserve
Continue to juncture/Trask for Scout Reservation
Follow dirt road to right
Continue on dirt road to Twin Springs Trailhead
Continue to the next section
Turn left to 1st Ben Overturff Trailhead
Spring will be in draw under the land bridge
Weekdays 8:30am - 5pm. Closed Tuesdays
Weekends 7am - 5pm
$5 parking; street parking is free before the park entrance road
Monrovia Canyon Park Spring offers cold water and is located close to the Ben Overturff trail (7 miles).
http://www.ci.monrovia.ca.us/community-life/parks/342-monrovia-canyon-park
The flow is constant
Access is open to all

It was once a Tongva India-owned site. Now, it's surrounded with a high school. LA is still trying to plug it up, but the Tongva Indians are preventing that. It is crazy, since during an earthquake, this may be the only water that the entire city has for weeks.
This is University Highschool. Nearby the Kuruvungna Springs Cultural Center, and Museum, is a natural swimming pool. This pool hosts crawfish as well as other signs of healthy water. At the end of the field is the spring source. The public can visit the site every Saturday. www.gabrielinosprings.com