The Charles River separates Boston and Cambridge. Since the time this song came out in 1966, the river has undergone a massive cleanup, and now the water is clearer and even swimable.

I'm gonna tell you a story. I'm gonna tell you about my town. I'm gonna tell you a big bad story, baby. Aww, it's all about my town Yeah, down by the river, Down by the banks of the river Charles (aw, that's what's happenin' baby). That's where you'll find me, Along with lovers, fuggers, and thieves (aw, but they're cool people). But, I love that dirty water, Oh, Boston, you're my home (aw, you're the number one place). Frustrated women (I mean they're frustrated), Have to be in by twelve o'clock (oh, that's a shame). But I'm wishin' and a-hopin', oh, That just once those doors weren't locked (I like to save time for my baby to walk around). Well I love that dirty water. Oh, Boston, you're my home (oh, yeah). Instrumental break... 'Cause I love that dirty water. Oh, oh, Boston, you're my home (oh, yeah). Well, I love that dirty water (I love it, baby)... I love that dirty water (I love Baw-stun)... I love that dirty water (Have you heard about the Strangler?)... I love that dirty water (I'm the man, I'm the man)... I love that dirty water (Owww!)... I love that dirty water (Come on, come on)...